{"id":1378,"date":"2026-04-14T10:34:15","date_gmt":"2026-04-14T10:34:15","guid":{"rendered":"https:\/\/shieldhz.com\/?page_id=1378"},"modified":"2026-05-08T07:48:31","modified_gmt":"2026-05-08T07:48:31","slug":"lw42-rotary-cam-switches","status":"publish","type":"page","link":"https:\/\/shieldhz.com\/pt\/rotary-cam-switches\/lw42-rotary-cam-switches\/","title":{"rendered":"Chaves de came rotativas LW42"},"content":{"rendered":"\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-lw42hero\" data-block-id=\"lw42hero\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-lw42hero-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-lw42heroc\" data-v=\"4\" data-block-id=\"lw42heroc\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-lw42heroc-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks 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img{width:100%;aspect-ratio:4\/3;object-fit:cover;display:block}.shz-lw42-figure figcaption{padding:14px 16px;color:var(--muted);font-size:.88rem;line-height:1.5}.shz-lw42-figure figcaption b{display:block;color:var(--text);font-size:.96rem;margin:0 0 4px}\n  .shz-lw42-faq{max-width:980px;margin:0 auto;display:grid;gap:10px}.shz-lw42-faq details{background:#fff;border:1px solid var(--border);border-radius:12px;overflow:hidden;box-shadow:0 8px 22px rgba(17,28,46,.05)}.shz-lw42-faq summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 20px;color:var(--text);font-weight:850;line-height:1.35}.shz-lw42-faq summary::-webkit-details-marker{display:none}.shz-lw42-faq summary:after{content:\"+\";flex:0 0 28px;width:28px;height:28px;border-radius:8px;background:#edf3fa;color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:1.1rem;font-weight:850}.shz-lw42-faq details[open] summary{border-bottom:1px solid var(--border)}.shz-lw42-faq details[open] summary:after{content:\"-\";background:var(--blue);color:#fff}.shz-lw42-faq p{margin:0;padding:16px 20px 18px;color:var(--muted);font-size:.92rem;line-height:1.62}\n  .shz-lw42-cta{background:var(--navy);color:#fff}.shz-lw42-cta-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center}.shz-lw42-cta h2{margin:0 0 12px;color:#fff;font-size:clamp(1.8rem,3vw,2.6rem);line-height:1.08}.shz-lw42-cta p{margin:0;color:#c8d8ee;line-height:1.66}.shz-lw42-quote{background:#fff;border-radius:14px;padding:24px;color:var(--text);display:grid;gap:10px}.shz-lw42-quote span{display:block;padding:10px 12px;border:1px solid var(--border);border-radius:8px;background:#f8fafc;color:var(--muted);font-size:.9rem}.shz-lw42-quote a{min-height:46px;border-radius:8px;background:var(--blue);color:#fff!important;display:inline-flex;align-items:center;justify-content:center;font-weight:800;text-decoration:none;margin-top:4px}\n  @media(max-width:1080px){.shz-lw42-grid,.shz-lw42-gallery{grid-template-columns:repeat(2,1fr)}.shz-lw42-split,.shz-lw42-cta-grid{grid-template-columns:1fr}}@media(max-width:690px){.shz-lw42-wrap{padding:0 16px}.shz-lw42-sec{padding:56px 0}.shz-lw42-grid,.shz-lw42-gallery{grid-template-columns:1fr}.shz-lw42-hero{min-height:auto;padding:0;display:block}.shz-lw42-bg{position:relative;width:100%;height:clamp(260px,66vw,440px)}.shz-lw42-mask{background:linear-gradient(180deg,rgba(17,28,46,0) 0%,rgba(17,28,46,.2) 38%,#111c2e 100%)}.shz-lw42-hero-inner{padding:28px 16px 0;margin-top:-42px}.shz-lw42-actions,.shz-lw42-btn{width:100%}.shz-lw42-metrics{position:relative;left:auto;bottom:auto;transform:none;width:calc(100% - 32px);margin:22px auto 0}.shz-lw42-metrics-grid{grid-template-columns:repeat(2,1fr)}.shz-lw42-tablebox{overflow-x:auto}}\n<\/style>\n<section class=\"shz-lw42 shz-lw42-hero\" aria-label=\"LW42 rotary cam switch banner\">\n  <div class=\"shz-lw42-bg\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/lw42-panel-mount-standard.webp\" alt=\"Shieldhz LW42 panel mount rotary cam switch with black handle and numbered faceplate\" loading=\"eager\" decoding=\"async\"><\/div>\n  <div class=\"shz-lw42-mask\"><\/div>\n  <div class=\"shz-lw42-hero-inner\"><div class=\"shz-lw42-hero-content\">\n    <span class=\"shz-lw42-eyebrow\">LW42 Series Universal Changeover Switch<\/span>\n    <h1 class=\"shz-lw42-title\"><span class=\"main\">LW42 Rotary Cam Switch<\/span><span class=\"sub\">20A to 32A, 440V AC<\/span><\/h1>\n    <p class=\"shz-lw42-desc\">Compact universal rotary cam switch for panel mounting, single-hole mounting, key-lock operation, and padlock handle assemblies. Use LW42 for control panels that need clear position switching with configurable contact stages.<\/p>\n    <div class=\"shz-lw42-actions\"><a class=\"shz-lw42-btn shz-lw42-btn-primary\" href=\"#lw42-specs\">View Technical Parameters<\/a><a class=\"shz-lw42-btn shz-lw42-btn-secondary\" href=\"#ct-popup-1234\">Request a Quote<\/a><\/div>\n  <\/div><\/div>\n  <div class=\"shz-lw42-metrics\"><div class=\"shz-lw42-metrics-grid\"><div class=\"shz-lw42-metric\"><b>20A \/ 25A \/ 32A<\/b><span>Thermal Current Ith<\/span><\/div><div class=\"shz-lw42-metric\"><b>440V AC<\/b><span>Rated Voltage Ue<\/span><\/div><div class=\"shz-lw42-metric\"><b>AC-23A<\/b><span>15A to 25A<\/span><\/div><div class=\"shz-lw42-metric\"><b>0.3M cycles<\/b><span>Mechanical Life<\/span><\/div><\/div><\/div>\n<\/section>\n<!-- SHZ-SERIES-TRUSTBAR: Certification logo marquee copied from LW28 series page -->\n<style id=\"shz-series-trustbar-style\">\n  .shz-series-trustbar{--tb-item:260px;--tb-gap:24px;position:relative;padding:20px 0;margin:0;overflow:hidden;background:#f4f7fb;border-bottom:1px solid #e0e8f0}\n  .shz-series-trustbar-inner{position:relative;z-index:1;max-width:1440px;margin:0 auto;padding:0 16px}\n  .shz-series-trustbar-head{display:flex;align-items:center;gap:10px;margin:0 0 12px;color:#7a90ad;font-size:.74rem;text-transform:uppercase;letter-spacing:.10em;font-weight:700}\n  .shz-series-trustbar-head:before,.shz-series-trustbar-head:after{content:\"\";flex:1;height:1px;background:#dde4ed}\n  .shz-series-trustbar-viewport{width:100%;overflow:hidden}\n  .shz-series-trustbar-track{display:flex;width:max-content;animation:shzSeriesTrustScroll 18s linear infinite;will-change:transform}\n  .shz-series-trustbar-set{display:flex;align-items:center;gap:var(--tb-gap);min-width:calc((var(--tb-item) * 7) + (var(--tb-gap) * 6));padding-right:var(--tb-gap)}\n  .shz-series-trustbar-item{width:var(--tb-item);height:88px;border-radius:10px;border:1px solid #dde4ed;background:#fff;box-shadow:0 2px 8px rgba(17,28,46,.08),0 1px 2px rgba(17,28,46,.04);display:flex;align-items:center;justify-content:center;padding:8px 14px;flex:0 0 auto}\n  .shz-series-trustbar-item img{height:44px;width:auto;max-width:100%;object-fit:contain;display:block}\n  @keyframes shzSeriesTrustScroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}\n  @media(max-width:690px){.shz-series-trustbar{--tb-item:210px;--tb-gap:14px}.shz-series-trustbar-item{height:74px}.shz-series-trustbar-item img{height:36px}.shz-series-trustbar-track{animation-duration:15s}}\n<\/style>\n<section class=\"shz-series-trustbar\" aria-label=\"Certifications and standards\">\n  <div class=\"shz-series-trustbar-inner\">\n    <div class=\"shz-series-trustbar-head\">Certified &amp; Standards-Based<\/div>\n    <div class=\"shz-series-trustbar-viewport\">\n      <div class=\"shz-series-trustbar-track\" aria-hidden=\"true\">\n        <div class=\"shz-series-trustbar-set\">\n          <div class=\"shz-series-trustbar-item\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/shieldhz-certification-ce-mark.webp\" alt=\"CE conformity mark certification logo\" loading=\"lazy\" decoding=\"async\"><\/div>\n          <div class=\"shz-series-trustbar-item\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/shieldhz-certification-tuv-rheinland-mark.webp\" alt=\"TUV Rheinland certification logo\" loading=\"lazy\" decoding=\"async\"><\/div>\n          <div class=\"shz-series-trustbar-item\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/shieldhz-certification-ul-mark.webp\" alt=\"UL certification mark logo\" loading=\"lazy\" decoding=\"async\"><\/div>\n          <div class=\"shz-series-trustbar-item\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/shieldhz-certification-ccc-mark.webp\" alt=\"China Compulsory Certification CCC mark logo\" loading=\"lazy\" decoding=\"async\"><\/div>\n          <div class=\"shz-series-trustbar-item\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/shieldhz-certification-ukca-mark.webp\" alt=\"UKCA conformity assessment mark logo\" loading=\"lazy\" decoding=\"async\"><\/div>\n          <div class=\"shz-series-trustbar-item\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/shieldhz-certification-rohs-mark.webp\" alt=\"RoHS compliance certification logo\" loading=\"lazy\" decoding=\"async\"><\/div>\n          <div class=\"shz-series-trustbar-item\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/shieldhz-certification-iso-9001-mark.webp\" alt=\"ISO 9001 quality management certification logo\" loading=\"lazy\" decoding=\"async\"><\/div>\n        <\/div>\n        <div class=\"shz-series-trustbar-set\">\n          <div class=\"shz-series-trustbar-item\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/shieldhz-certification-ce-mark.webp\" alt=\"CE conformity mark certification logo\" loading=\"lazy\" decoding=\"async\"><\/div>\n          <div class=\"shz-series-trustbar-item\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/shieldhz-certification-tuv-rheinland-mark.webp\" alt=\"TUV Rheinland certification logo\" loading=\"lazy\" decoding=\"async\"><\/div>\n          <div class=\"shz-series-trustbar-item\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/shieldhz-certification-ul-mark.webp\" alt=\"UL certification mark logo\" loading=\"lazy\" decoding=\"async\"><\/div>\n          <div class=\"shz-series-trustbar-item\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/shieldhz-certification-ccc-mark.webp\" alt=\"China Compulsory Certification CCC mark logo\" loading=\"lazy\" decoding=\"async\"><\/div>\n          <div class=\"shz-series-trustbar-item\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/shieldhz-certification-ukca-mark.webp\" alt=\"UKCA conformity assessment mark logo\" loading=\"lazy\" decoding=\"async\"><\/div>\n          <div class=\"shz-series-trustbar-item\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/shieldhz-certification-rohs-mark.webp\" alt=\"RoHS compliance certification logo\" loading=\"lazy\" decoding=\"async\"><\/div>\n          <div class=\"shz-series-trustbar-item\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/shieldhz-certification-iso-9001-mark.webp\" alt=\"ISO 9001 quality management certification logo\" loading=\"lazy\" decoding=\"async\"><\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/section>\n\n<!-- SHZ-LW42-HERO END -->\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-lw42intro\" data-block-id=\"lw42intro\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-lw42intro-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-lw42introc\" data-v=\"4\" data-block-id=\"lw42introc\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-lw42introc-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-lw42introc-inner-blocks\">\n<!-- SHZ-LW42-INTRO START -->\n<section class=\"shz-lw42 shz-lw42-sec\">\n  <div class=\"shz-lw42-wrap shz-lw42-split\"><figure class=\"shz-lw42-photo\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/lw42-panel-mount-front.webp\" alt=\"Shieldhz LW42 panel mount rotary cam switch front view for compact control panels\" loading=\"lazy\" decoding=\"async\"><\/figure><div><span class=\"shz-lw42-kicker\">Series Position<\/span><h2 class=\"shz-lw42-h2\">Universal Changeover Switch For Compact Control Panels<\/h2><p class=\"shz-lw42-lead\">LW42 covers three current classes and several front operation formats. It sits alongside the <a href=\"https:\/\/shieldhz.com\/rotary-cam-switches\/lw28-rotary-cam-switches\/\">LW28 rotary cam switch<\/a> family, but focuses on compact 20A to 32A assemblies for control cabinets, small machinery panels, HVAC control boxes, and operator stations where space and handle format matter.<\/p><p class=\"shz-lw42-note\">Use this page when the project needs a compact universal changeover switch rather than a high-current cam switch. If the duty is closer to main circuit isolation or red-yellow safety disconnect operation, compare the related <a href=\"https:\/\/shieldhz.com\/rotary-cam-switches\/sh30-rotary-cam-switches\/\">SH30 load isolator switches<\/a> before final selection.<\/p><\/div><\/div>\n<\/section>\n<!-- SHZ-LW42-INTRO END -->\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-lw42specs\" data-block-id=\"lw42specs\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-lw42specs-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-lw42specsc\" data-v=\"4\" data-block-id=\"lw42specsc\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-lw42specsc-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-lw42specsc-inner-blocks\">\n<!-- SHZ-LW42-SPECS START -->\n<section id=\"lw42-specs\" class=\"shz-lw42 shz-lw42-sec shz-lw42-alt\">\n  <div class=\"shz-lw42-wrap\"><header class=\"shz-lw42-head\"><span class=\"shz-lw42-kicker\">Technical Parameters<\/span><h2 class=\"shz-lw42-h2\">LW42 Electrical Ratings<\/h2><p class=\"shz-lw42-lead\">Use these ratings as the first sizing filter, then confirm utilization category, contact program, installation depth, and certification market before quotation. LW42 is normally selected by AC switching duty and handle structure, not by thermal current alone.<\/p><\/header><div class=\"shz-lw42-tablebox\"><table class=\"shz-lw42-table\" aria-label=\"LW42 electrical technical parameters\"><thead><tr><th>Model<\/th><th>Ith A<\/th><th>Ue V<\/th><th>AC-23A Ie A<\/th><th>AC-3 Ie A<\/th><th>Life<\/th><\/tr><\/thead><tbody><tr><td>LW42-20<\/td><td>20<\/td><td>440<\/td><td>15<\/td><td>11<\/td><td>Mechanical 0.3 x 10^6 cycles; electrical 0.05 x 10^6 cycles; operating frequency 120 times\/hour.<\/td><\/tr><tr><td>LW42-25<\/td><td>25<\/td><td>440<\/td><td>20<\/td><td>15<\/td><td>Mechanical 0.3 x 10^6 cycles; electrical 0.05 x 10^6 cycles; operating frequency 120 times\/hour.<\/td><\/tr><tr><td>LW42-32<\/td><td>32<\/td><td>440<\/td><td>25<\/td><td>18<\/td><td>Mechanical 0.3 x 10^6 cycles; electrical 0.05 x 10^6 cycles; operating frequency 120 times\/hour.<\/td><\/tr><\/tbody><\/table><\/div><p class=\"shz-lw42-note\">Ith = conventional thermal current. Ue = rated operational voltage. Use the AC-23A or AC-3 value when sizing for motor or inductive load switching. For simple resistive or mixed loads, state whether the project uses AC-21A, AC-22A, or AC-23A duty so the contact program can be checked against the real load profile.<\/p><p class=\"shz-lw42-note\">For standards review, compare the switch application against <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/107159\" target=\"_blank\" rel=\"noopener\">IEC 60947-3<\/a>. For North American panels, state whether <a href=\"https:\/\/www.shopulstandards.com\/ProductDetail.aspx?productId=UL508\" target=\"_blank\" rel=\"noopener\">UL 508<\/a> documentation or label confirmation is required; certification availability must be confirmed by model, handle format, and target market.<\/p><\/div>\n<\/section>\n<!-- SHZ-LW42-SPECS END -->\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-lw42formats\" data-block-id=\"lw42formats\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-lw42formats-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-lw42formatsc\" data-v=\"4\" data-block-id=\"lw42formatsc\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-lw42formatsc-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-lw42formatsc-inner-blocks\">\n<!-- SHZ-LW42-FORMATS START -->\n<section class=\"shz-lw42 shz-lw42-sec\">\n  <div class=\"shz-lw42-wrap\"><header class=\"shz-lw42-head shz-lw42-center\"><span class=\"shz-lw42-kicker\">Installation Formats<\/span><h2 class=\"shz-lw42-h2\">Panel, Single-hole, Key-lock, And Padlock Mounting<\/h2><p class=\"shz-lw42-lead\">Use the installation format and dimension table before confirming panel cutout, shaft depth, handle style, and operator access. The same electrical class can behave very differently in a cabinet layout depending on whether the switch is front-panel operated, single-hole mounted, key controlled, or lockable for maintenance procedures.<\/p><\/header><div class=\"shz-lw42-gallery\"><figure class=\"shz-lw42-figure\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/lw42-panel-mount-standard.webp\" alt=\"LW42 panel mount rotary cam switch with numbered faceplate\" loading=\"lazy\" decoding=\"async\"><figcaption><b>Panel mount<\/b>Square front plate format for standard control cabinet installation where the operator needs clear position indication on the door or front plate.<\/figcaption><\/figure><figure class=\"shz-lw42-figure\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/lw42-din-rail-standard.webp\" alt=\"LW42 single-hole mounting rotary cam switch with black handle and square faceplate\" loading=\"lazy\" decoding=\"async\"><figcaption><b>Single-hole mount<\/b>Single-hole installation for compact panels where the handle assembly passes through the front opening; confirm the 22.3 mm opening, key slot, and rear clearance before production.<\/figcaption><\/figure><figure class=\"shz-lw42-figure\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/lw42-key-lock-panel.webp\" alt=\"LW42 key lock panel rotary cam switch with red yellow handle\" loading=\"lazy\" decoding=\"async\"><figcaption><b>Key-lock format<\/b>For applications requiring controlled operation, authorized switching, or a defined key removal position during maintenance or test procedures.<\/figcaption><\/figure><figure class=\"shz-lw42-figure\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/lw42-gsc-padlock-handle.webp\" alt=\"LW42 GSC padlock handle rotary cam switch with red yellow safety handle\" loading=\"lazy\" decoding=\"async\"><figcaption><b>Padlock handle<\/b>Red-yellow safety handle format for lockout-oriented operation where the OFF position must remain visible and controlled during service work.<\/figcaption><\/figure><\/div><\/div>\n<\/section>\n<!-- SHZ-LW42-FORMATS END -->\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-lw42dims\" data-block-id=\"lw42dims\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-lw42dims-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-lw42dimsc\" data-v=\"4\" data-block-id=\"lw42dimsc\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-lw42dimsc-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-lw42dimsc-inner-blocks\">\n<!-- SHZ-LW42-DIMS START -->\n<section class=\"shz-lw42 shz-lw42-sec shz-lw42-alt\">\n  <div class=\"shz-lw42-wrap\"><header class=\"shz-lw42-head\"><span class=\"shz-lw42-kicker\">Dimensions<\/span><h2 class=\"shz-lw42-h2\">External And Installation Dimensions<\/h2><\/header><div class=\"shz-lw42-tablebox\"><table class=\"shz-lw42-table\" aria-label=\"LW42 mounting dimensions\"><thead><tr><th>Installation<\/th><th>Model<\/th><th>A<\/th><th>B<\/th><th>L<\/th><\/tr><\/thead><tbody><tr><td>Panel mounting<\/td><td>LW42-20<\/td><td>52<\/td><td>52<\/td><td>37 + 9.5n<\/td><\/tr><tr><td>Panel mounting<\/td><td>LW42-25 \/ LW42-32<\/td><td>61<\/td><td>54.5<\/td><td>38 + 11.5n<\/td><\/tr><tr><td>Single-hole mounting<\/td><td>LW42-20<\/td><td>52<\/td><td>52<\/td><td>57 + 9.5n<\/td><\/tr><tr><td>Single-hole mounting<\/td><td>LW42-25 \/ LW42-32<\/td><td>61<\/td><td>54.5<\/td><td>58 + 11.5n<\/td><\/tr><tr><td>Key-lock mounting<\/td><td>LW42-20<\/td><td>52<\/td><td>52<\/td><td>37 + 9.5n<\/td><\/tr><tr><td>Key-lock mounting<\/td><td>LW42-25 \/ LW42-32<\/td><td>61<\/td><td>54.5<\/td><td>38 + 11.5n<\/td><\/tr><tr><td>Padlock mounting<\/td><td>LW42-20<\/td><td>65<\/td><td>65<\/td><td>37 + 9.5n<\/td><\/tr><tr><td>Padlock mounting<\/td><td>LW42-25 \/ LW42-32<\/td><td>65<\/td><td>65<\/td><td>38 + 11.5n<\/td><\/tr><\/tbody><\/table><\/div><p class=\"shz-lw42-note\">Unit: mm. n = number of contact system stages. Confirm the final installation drawing before production because additional stages increase the switch depth and can affect wire bend radius, terminal access, and enclosure clearance. If your panel already has a fixed cutout, send the opening size and available rear depth with the inquiry. This helps Shieldhz confirm whether the chosen handle, contact stack, and terminal access remain practical before a sample is built.<\/p><\/div>\n<\/section>\n<!-- SHZ-LW42-DIMS END -->\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-lw42select\" data-block-id=\"lw42select\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-lw42select-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-lw42selectc\" data-v=\"4\" data-block-id=\"lw42selectc\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-lw42selectc-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-lw42selectc-inner-blocks\">\n<!-- SHZ-LW42-SELECTION START -->\n<section class=\"shz-lw42 shz-lw42-sec\">\n  <div class=\"shz-lw42-wrap\"><header class=\"shz-lw42-head\"><span class=\"shz-lw42-kicker\">Selection Guide<\/span><h2 class=\"shz-lw42-h2\">How To Specify An LW42 Switch<\/h2><\/header><div class=\"shz-lw42-grid\"><article class=\"shz-lw42-card\"><b>Step 1<\/b><h3>Choose current class<\/h3><p>Select LW42-20, LW42-25, or LW42-32 according to operating current and required AC-23A or AC-3 duty. Do not size from Ith alone when the switch controls a motor, transformer, or other inductive load.<\/p><\/article><article class=\"shz-lw42-card\"><b>Step 2<\/b><h3>Confirm installation type<\/h3><p>Choose panel mounting, single-hole mounting, key-lock mounting, or padlock mounting according to cabinet design. Include front plate size, 22.3 mm single-hole requirement where applicable, handle color, key requirement, and available rear depth.<\/p><\/article><article class=\"shz-lw42-card\"><b>Step 3<\/b><h3>Send the contact program<\/h3><p>For D0414, 9C04, D0081, C04, GSC, or other contact sequences, share the wiring diagram and target handle positions. Catalogue examples include LW42-20\/D0414\/2, LW42-20\/9C04\/2, LW42-20\/D0081\/1\/OMI, LW42-20\/C04\/2\/S, and LW42-20\/D0414\/2GSC. Position labels should match the final panel legend.<\/p><\/article><article class=\"shz-lw42-card\"><b>Step 4<\/b><h3>Confirm documents and batch needs<\/h3><p>Ask for datasheets, drawings, certificates, sample quantity, MOQ, and lead time before batch production. For broader product routing, return to the <a href=\"https:\/\/shieldhz.com\/rotary-cam-switches\/\">rotary cam switches<\/a> category page.<\/p><\/article><\/div><\/div>\n<\/section>\n<!-- SHZ-LW42-SELECTION END -->\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-lw42quality\" data-block-id=\"lw42quality\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-lw42quality-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-lw42qualityc\" data-v=\"4\" data-block-id=\"lw42qualityc\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-lw42qualityc-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-lw42qualityc-inner-blocks\">\n<!-- SHZ-LW42-QUALITY START -->\n<section class=\"shz-lw42 shz-lw42-sec shz-lw42-alt\">\n  <div class=\"shz-lw42-wrap shz-lw42-split\"><div><span class=\"shz-lw42-kicker\">Quality Control<\/span><h2 class=\"shz-lw42-h2\">Confirm Function Before Batch Production<\/h2><p class=\"shz-lw42-lead\">LW42 is usually selected by contact program and installation structure, not only by current rating. For OEM projects, provide target panel layout, handle legend, position count, and wiring sequence so the switch program can be confirmed before quotation. Shieldhz can then check the contact stage count, handle option, terminal arrangement, and document package before samples or batch production. For drawings, datasheets, and certificate routing, use the <a href=\"https:\/\/shieldhz.com\/resources\/\">Shieldhz resources<\/a> page or send the exact model requirement through <a href=\"https:\/\/shieldhz.com\/contact\/\">contact sales<\/a>.<\/p><\/div><figure class=\"shz-lw42-photo\"><img src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/04\/shieldhz-universal-changeover-switch-testing-station.webp\" alt=\"Shieldhz switch testing station for rotary cam switch quality control\" loading=\"lazy\" decoding=\"async\"><\/figure><\/div>\n<\/section>\n<!-- SHZ-LW42-QUALITY END -->\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-lw42apps\" data-block-id=\"lw42apps\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-lw42apps-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-lw42appsc\" data-v=\"4\" data-block-id=\"lw42appsc\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-lw42appsc-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-lw42appsc-inner-blocks\">\n<!-- SHZ-LW42-APPLICATIONS START -->\n<section class=\"shz-lw42 shz-lw42-sec\">\n  <div class=\"shz-lw42-wrap\"><header class=\"shz-lw42-head\"><span class=\"shz-lw42-kicker\">Applications<\/span><h2 class=\"shz-lw42-h2\">Where LW42 Changeover Switches Are Used<\/h2><p class=\"shz-lw42-lead\">LW42 is best suited to compact control panels that need defined rotary positions, repeatable switching logic, and a front interface that is easier to read than a small toggle or push button group. The series is commonly used when the load is moderate but the switching sequence still needs a cam-programmed contact arrangement.<\/p><\/header><div class=\"shz-lw42-grid\"><article class=\"shz-lw42-card\"><b>Control panels<\/b><h3>Mode selection and source changeover<\/h3><p>Use LW42 for AUTO-MANUAL, LOCAL-REMOTE, phase selection, and small source transfer functions where the operator needs a clear handle position. For higher current or larger contact programs, compare the <a href=\"https:\/\/shieldhz.com\/rotary-cam-switches\/lw28-rotary-cam-switches\/\">LW28 series<\/a>.<\/p><\/article><article class=\"shz-lw42-card\"><b>Machinery<\/b><h3>Motor and equipment command circuits<\/h3><p>For pumps, fans, conveyors, and compact machinery, LW42 can switch control circuits or moderate AC loads when the AC-23A or AC-3 rating matches the real duty. Share motor power, voltage, and switching frequency before selecting the final contact program.<\/p><\/article><article class=\"shz-lw42-card\"><b>Maintenance<\/b><h3>Key-lock and padlock operation<\/h3><p>Key-lock and padlock handle formats help restrict unauthorized operation or keep the OFF position controlled during service work. They do not replace the full safety assessment for a machine, but they give panel builders a practical hardware option for controlled switching.<\/p><\/article><\/div><\/div>\n<\/section>\n<!-- SHZ-LW42-APPLICATIONS END -->\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-lw42faq\" data-block-id=\"lw42faq\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-lw42faq-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-lw42faqc\" data-v=\"4\" data-block-id=\"lw42faqc\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-lw42faqc-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-lw42faqc-inner-blocks\">\n<!-- SHZ-LW42-FAQ START -->\n<section class=\"shz-lw42 shz-lw42-sec\">\n  <div class=\"shz-lw42-wrap\"><header class=\"shz-lw42-head shz-lw42-center\"><span class=\"shz-lw42-kicker\">FAQ<\/span><h2 class=\"shz-lw42-h2\">LW42 Rotary Cam Switch FAQ<\/h2><\/header><div class=\"shz-lw42-faq\"><details open><summary>What current ratings are available for LW42?<\/summary><p>The catalogue page lists LW42-20, LW42-25, and LW42-32 with conventional thermal currents of 20A, 25A, and 32A. The rated operational voltage is 440V AC. Use the table as a starting point, then confirm the real switching duty, contact program, and installation format before ordering.<\/p><\/details><details><summary>Which rating should be used for motor loads?<\/summary><p>Use the AC-23A or AC-3 line according to switching duty. AC-23A values are 15A, 20A, and 25A for LW42-20, LW42-25, and LW42-32 respectively. If the load is mixed or highly inductive, share the motor power and switching frequency so the engineering team can check whether LW42 or a larger series is more suitable.<\/p><\/details><details><summary>What does n mean in the L dimension?<\/summary><p>n is the number of contact system stages. The final depth increases with contact stage count, so cabinet clearance must be confirmed against the final contact program. This is important for compact enclosures because terminal access and wire bend radius can become the limiting factors.<\/p><\/details><details><summary>Can LW42 be supplied with key-lock or padlock handles?<\/summary><p>Yes. The catalogue shows key-lock mounting and padlock mounting formats. Specify whether the project needs key removal positions, lockable OFF position, a red-yellow safety handle, or a standard black handle with position markings.<\/p><\/details><details><summary>What standards should be checked for LW42 projects?<\/summary><p>For low-voltage rotary switch applications, IEC 60947-3 is the main standards context to confirm. For North American panels, tell Shieldhz whether UL 508 documentation or model-level label confirmation is required. Do not assume every handle or contact variant carries the same certification package.<\/p><\/details><details><summary>Can Shieldhz provide drawings, samples, and certificates before batch production?<\/summary><p>Yes. Request the datasheet, installation drawing, certificate copy, and sample plan before a batch order. Include quantity, target market, panel cutout, contact program, handle legend, and delivery schedule so the quotation includes the correct document package and lead time.<\/p><\/details><details><summary>How should I request a quotation?<\/summary><p>Send model class, current, voltage, installation type, contact program, handle marking, number of stages, quantity, and target certification requirement. A wiring diagram is preferred because it lets Shieldhz confirm the contact sequence before pricing and reduces the risk of ordering the wrong switch program.<\/p><\/details><\/div><\/div>\n<\/section>\n<!-- SHZ-LW42-FAQ END -->\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-lw42cta\" data-block-id=\"lw42cta\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-lw42cta-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-lw42ctac\" data-v=\"4\" data-block-id=\"lw42ctac\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-lw42ctac-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-lw42ctac-inner-blocks\">\n<!-- SHZ-LW42-CTA START -->\n<style id=\"shz-lw42-cta-align\">\n  .shz-lw42-cta {\n    position: relative !important;\n    overflow: hidden !important;\n    width: 100vw !important;\n    margin: 0 0 0 calc(50% - 50vw) !important;\n    padding: 0 !important;\n    background: linear-gradient(115deg,#061A36 0%,#082B58 56%,#0E4A93 100%) !important;\n    color: #FFFFFF !important;\n    border-top: 0 !important;\n  }\n  .shz-lw42-cta:before {\n    content: \"\";\n    position: absolute;\n    inset: 0;\n    background: radial-gradient(circle at 78% 25%,rgba(74,143,212,.24),transparent 34%);\n    pointer-events: none;\n  }\n  .shz-lw42-cta-grid {\n    position: relative !important;\n    z-index: 1 !important;\n    width: min(1440px, calc(100% - 96px)) !important;\n    max-width: none !important;\n    margin: 0 auto !important;\n    padding: 72px 0 !important;\n    display: grid !important;\n    grid-template-columns: minmax(0,1fr) minmax(500px,.84fr) !important;\n    gap: 94px !important;\n    align-items: center !important;\n    box-sizing: border-box !important;\n  }\n  .shz-lw42-cta-copy {\n    position: relative !important;\n    min-height: 330px !important;\n    display: flex !important;\n    flex-direction: column !important;\n    justify-content: center !important;\n    padding-left: 96px !important;\n    isolation: isolate !important;\n  }\n  .shz-lw42-cta-art {\n    position: absolute !important;\n    left: -245px !important;\n    top: 50% !important;\n    width: 840px !important;\n    height: 460px !important;\n    transform: translateY(-50%) !important;\n    opacity: .32 !important;\n    z-index: 0 !important;\n    pointer-events: none !important;\n  }\n  .shz-lw42-cta-art img { width: 100% !important; 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}\n  }\n<\/style>\n<section id=\"lw42-inquiry\" class=\"shz-lw42 shz-lw42-sec shz-lw42-cta\" aria-labelledby=\"lw42-cta-title\">\n  <div class=\"shz-lw42-wrap shz-lw42-cta-grid\">\n    <div class=\"shz-lw42-cta-copy\">\n      <div class=\"shz-lw42-cta-art\"><img decoding=\"async\" src=\"https:\/\/shieldhz.com\/wp-content\/uploads\/2026\/05\/rotary-three-products-line-art-cta.webp\" alt=\"Line art showing Shieldhz rotary switch product routes\"><\/div>\n      <span class=\"shz-lw42-eyebrow\">Inquiry<\/span>\n      <h2 id=\"lw42-cta-title\">Send The LW42 Requirement,<br>We Confirm The Model<\/h2>\n      <p>Share current class, mounting format, contact program, handle requirement, quantity, certificate market, and delivery schedule. Shieldhz will confirm the LW42 model code, drawings, sample route, and batch lead time.<\/p>\n    <\/div>\n    <div class=\"shz-lw42-cta-form-shell\"><div class='fluentform ff-default fluentform_wrapper_1 ffs_default_wrap'><form data-form_id=\"1\" id=\"fluentform_1\" class=\"frm-fluent-form fluent_form_1 ff-el-form-top ff_form_instance_1_1 ff-form-loading ffs_default\" data-form_instance=\"ff_form_instance_1_1\" method=\"POST\" ><fieldset  style=\"border: none!important;margin: 0!important;padding: 0!important;background-color: transparent!important;box-shadow: none!important;outline: none!important; min-inline-size: 100%;\">\n                    <legend class=\"ff_screen_reader_title\" style=\"display: block; margin: 0!important;padding: 0!important;height: 0!important;text-indent: -999999px;width: 0!important;overflow:hidden;\">Contact Form Demo<\/legend><input type='hidden' name='__fluent_form_embded_post_id' value='1378' \/><input type=\"hidden\" id=\"_fluentform_1_fluentformnonce\" name=\"_fluentform_1_fluentformnonce\" value=\"0fab207f56\" \/><input type=\"hidden\" name=\"_wp_http_referer\" value=\"\/pt\/wp-json\/wp\/v2\/pages\/1378\" \/><div data-type=\"name-element\" data-name=\"names\" class=\" ff-field_container ff-name-field-wrapper\" ><div class='ff-t-container'><div class='ff-t-cell '><div class='ff-el-group'><div class=\"ff-el-input--label asterisk-right\"><label for='ff_1_names_first_name_' id='label_ff_1_names_first_name_' >Name<\/label><\/div><div class='ff-el-input--content'><input type=\"text\" name=\"names[first_name]\" id=\"ff_1_names_first_name_\" class=\"ff-el-form-control\" placeholder=\"Name\" aria-invalid=\"false\" aria-required=false><\/div><\/div><\/div><\/div><\/div><div class='ff-el-group'><div class=\"ff-el-input--label ff-el-is-required asterisk-right\"><label for='ff_1_email' id='label_ff_1_email' aria-label=\"Email\">Email<\/label><\/div><div class='ff-el-input--content'><input type=\"email\" 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mounting dimensions, and installation options.<\/p>","protected":false},"author":1,"featured_media":1996,"parent":1373,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_gspb_post_css":"","footnotes":""},"class_list":["post-1378","page","type-page","status-publish","has-post-thumbnail","hentry"],"blocksy_meta":{"has_hero_section":"disabled","vertical_spacing_source":"custom","content_area_spacing":"none","styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":6}},"_links":{"self":[{"href":"https:\/\/shieldhz.com\/pt\/wp-json\/wp\/v2\/pages\/1378","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/shieldhz.com\/pt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/shieldhz.com\/pt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/shieldhz.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/shieldhz.com\/pt\/wp-json\/wp\/v2\/comments?post=1378"}],"version-history":[{"count":16,"href":"https:\/\/shieldhz.com\/pt\/wp-json\/wp\/v2\/pages\/1378\/revisions"}],"predecessor-version":[{"id":2742,"href":"https:\/\/shieldhz.com\/pt\/wp-json\/wp\/v2\/pages\/1378\/revisions\/2742"}],"up":[{"embeddable":true,"href":"https:\/\/shieldhz.com\/pt\/wp-json\/wp\/v2\/pages\/1373"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/shieldhz.com\/pt\/wp-json\/wp\/v2\/media\/1996"}],"wp:attachment":[{"href":"https:\/\/shieldhz.com\/pt\/wp-json\/wp\/v2\/media?parent=1378"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}