SH30 Load Isolator Switch20A to 125A, 440V AC, IEC 60947-3
Safe main circuit isolation for HVAC, ventilation and water pump systems — with IP65 GS04 enclosures, AC-23A motor-rated contacts and door-interlock options.
SH30 Load Isolator Variants Shown As Real Assemblies
Use these views to compare handle format, contact body depth, door-coupling structure, key lock options, and high-current GS04 builds before confirming the final model code.
Compact GS04
SH30-32 / GS04
Red-yellow front handle assembly for visible local isolation on compact equipment panels.
High Current
SH30-100 / GS04
Larger 100A class body for main power isolation where terminal capacity and handle visibility matter.
Panel Handle
SH30 / OMI
Black handle panel format for standard cabinet mounting, selector-style operation, and clean front plates.
Key Lock
SH30 / M2S
Key-operated version for controlled access, authorized switching, and lockable maintenance states.
Door Coupling
Rear Coupling Build
Rear-side view showing the coupling shaft and terminal body layout for door-interlock assemblies.
Variant Range
SH30 Family
Side-by-side product forms for comparing red-yellow handles, black handles, contact bodies, and ratings.
Final selection depends on current rating, pole count, handle type, mounting method, enclosure requirement, and door interlock arrangement.Send model requirement
QUICK MATCH
How To Select The Right SH30 Load Isolator Switch
Match your load current, required poles, mounting method and enclosure type to the correct SH30 configuration in three steps.
1Current Rating
2Poles
3Mounting & Enclosure
SH30-32/3/M2S
32A · 3-Pole · Standard Panel Mount · IP2L0 · 240/440V AC
ⓘ For motor loads: apply a 1.25× safety factor to rated current and verify against the AC-23A switching capacity. For 4-pole neutral isolation, select the /4/ variant. Panel cutout: □64mm (all models 20A–100A), panel thickness 1–5mm.
Why Choose Shieldhz
Built for Industrial Reliability
IEC 60947-3 Compliant
AC-21A, AC-22A and AC-23A utilisation categories. Motor-rated for direct inductive load switching at full rated current — not just resistive loads.
10+ Years Manufacturing
Since 2014. 5,000 m² factory, 100+ staff, 40+ machines — full vertical control from tooling to final assembly and QC.
Trusted in 50+ Markets
Exported to Europe, Australia and Southeast Asia. CE, TUV, UL, UKCA and CCC marks accepted in all major export markets.
OEM & Custom Programs
Custom handle colours, contact programs and enclosure markings. MOQ from 500 units with full engineering support and documentation.
USE CASES
Typical SH30 Application Scenarios
The SH30 series covers three primary isolation duties across building services and industrial plant. Select your enclosure and current rating to match the installation environment.
SH30 GS04 safety enclosures provide IP65 protection for ventilation equipment main isolation. The red-yellow handle gives clear visual OFF confirmation required in HVAC maintenance procedures. AC-23A rated for fan motor inductive loads up to 22kW at 440V with 10,000-operation electrical life.
AC-23AIP653P / 4P32A – 63A
02
Water Pump & Building Services
Pressurisation pumps and building water management systems require robust main isolation rated for repetitive motor switching. SH30-100/4/GS04-2 delivers AC-23A capacity at 37kW / 440V — matching typical pump-room maintenance cycles at 30 operations per hour.
AC-23A100A4-PoleBuilding Services
03
Industrial Panel Main Isolation
The SH30 OMI single-hole variant and D2 door-interlock option integrate directly into machine control cabinets. Contact clearance exceeds same-class alternatives, and the fast-break mechanism is rated for DC switching — suitable for isolator switch duties in DC control circuits.
OMI / D2DC CapablePanel MountIP2L0
Selection Reference
Outdoor / Harsh Env.Choose GS04 enclosure (IP65)
Motor LoadSize to AC-23A rating, not thermal current
Panel IntegrationOMI (single hole) or D2 (door interlock)
Neutral IsolationSelect 4-pole (/4/) variant
TECH SPEC
SH30 Model Code And Technical Snapshot
Decode any SH30 model number and cross-check key electrical parameters before ordering.
Installation clearance, dimension references and technical downloads for engineering and procurement.
SH30-32/3/D2(150) — door interlock reference view
Share your final model code with our technical team to receive the correct installation drawing. SH30 panel cutout is □64mm for all 20A–100A models (panel thickness 1–5mm). For DIN rail door-interlock (D2) variants, specify shaft length: 50 / 100 / 150 / 200mm. Terminal torque: M4 screw, 1.2 N·m.
Datasheet Reference
SH30 series technical datasheet covering all current ratings, contact programs, enclosure types and electrical parameters.
Technical and sourcing questions covering selection, enclosure options, ratings, standards and applications for the SH30 series.
How do I select the right SH30 load isolator switch for my HVAC or pump application?
Start with the load current. For motor loads, identify the motor full-load current and apply a 1.25× safety factor to determine the minimum switch rating. For 440V circuits, cross-check the AC-23A switching capacity — the SH30-63 delivers 22kW at 440V under AC-23A. Choose GS04 enclosure for outdoor or harsh environments (IP65); M2S for standard panel mounting (IP2L0). For pump applications requiring 4-pole isolation of the neutral conductor, select a 4P variant such as SH30-63/4/GS04-2. If the motor is started direct-on-line more than 30 times per hour, also verify the AC-3 rating against your motor’s kW output.
What is the difference between IP2L0 and IP65 variants of the SH30 series?
IP2L0 (standard M2S panel mount) means the switch mechanism is mounted in a panel cutout with the panel itself providing enclosure protection — only the front handle and face achieve limited ingress resistance. The IP65 thermoplastic enclosure (GS04 suffix) fully encloses the switch body, providing complete dust-tight protection and resistance to water jets from any direction. Select IP65 for outdoor distribution boards, plant rooms, rooftop HVAC units, and any installation where the switch body is exposed to the environment rather than inside a sealed enclosure. The GS04 yellow body with red handle also provides clear visual OFF status confirmation required in many maintenance procedures.
What do AC-23A and AC-3 utilization categories mean for the SH30 isolator?
Both categories cover motor switching, but under different duty conditions. AC-23A is the load-break category for making and breaking inductive motor loads — it rates the switch for the higher transient currents that occur during motor start and stop. AC-3 applies to direct-online motor starters with higher frequency switching duty. For the SH30-100, the AC-23A rating at 440V is 37kW; the AC-3 rating is 30kW at the same voltage. Always size to the AC-23A figure for main isolation duty on HVAC and pump systems, where the primary function is safe disconnection rather than repetitive control switching.
Can SH30 switches be used with door interlock mechanisms?
Yes. The SH30-☆/D2(△) variant includes an extended shaft (50/100/150/200mm) designed for panel door interlock installations. The door interlock prevents the panel door from opening while the switch is in the ON position, and prevents the switch from being turned ON while the door is open — a safety requirement in many machinery and MCC panel standards. The DIN rail mounting dimension for D2 variants uses a standardized L=150mm shaft regardless of current rating, with K values of 50mm (20–32A), 61mm (40–63A) and 68mm (80–100A). Specify the required shaft length when ordering.
Which certifications and standards apply to SH30 load isolator switches?
SH30 series switches are designed and tested to IEC 60947-3 (low-voltage switchgear and controlgear — switches, disconnectors, and fuse-combination units) and the Chinese national standard GB14048.3. Certified models carry CE, TUV Rheinland, CCC, and UKCA marks depending on variant and current rating. The manufacturing facility operates under ISO 9001 quality management. For European export projects, CE and TUV marks are standard; for North American projects, confirm UL 508 compliance with your order specification.
Is the SH30 suitable for direct-on-line motor control or isolation duty only?
The SH30 is classified as a load break isolator — it is rated for making and breaking under load (AC-23A and AC-3 categories), so it can perform direct motor switching for small AC motors. However, it does not provide overload or short-circuit protection: a separate circuit breaker or fuse is required upstream. For main panel isolation of larger motors, the SH30 acts as the safety isolator between the supply and a downstream motor starter or variable frequency drive. The fast-break mechanism and high contact clearance also make the SH30 suitable for DC load isolation duties in rotary cam switch and DC control panel applications.
Are OEM configurations and non-standard variants available for the SH30?
Yes. Shieldhz supports OEM programs including custom handle colours beyond standard red-yellow and black, custom panel engravings and markings, non-standard shaft lengths for D2 door interlock variants, and specific certification configurations. Standard production models ship from stock or within short lead times; custom configurations require MOQ and tooling confirmation. Send your specification including current rating, enclosure type, quantity and reference drawings to [email protected] — our engineering team responds within 24 hours.
Share load current, pole count, mounting format, enclosure requirement, quantity, certificate market, and delivery schedule. Shieldhz will confirm the SH30 model code, drawings, sample route, and batch lead time.
