1P-4P Miniature Isolator Switch | Westhomes WSH3-125 32A-100A
Westhomes WSH3-125 miniature isolator switch offers 32A-100A, 1P-4P options, 400V insulation & 2kA short-time withstand current for industrial use.
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1P-4P Miniature Isolator Switch
Shield electrical systems with Westhomes WSH3-125 isolator switch! 1P-4P, 32A-100A, 400V insulation, 2kA withstand current & -5~+40°C operation.
The Westhomes WSH3-125 miniature isolator switch is an industrial-grade electrical component engineered for safe power isolation and circuit switching. With a rated current range of 32A-100A (20A-100A max) and 1P/2P/3P/4P pole options, it adapts to diverse industrial and commercial electrical systems.
Key Features：
Broad Current Rating: Supports 20A-100A (32A-100A core range) rated current, adaptable to diverse industrial electrical load requirements.
Multi-Pole Configurations: Offers 1P, 2P, 3P, and 4P connection options (shown in product imagery) for flexible integration into different circuit setups.
2kA Short-Time Withstand Current: Delivers robust protection against overcurrent surges, preventing damage to the switch and connected equipment.
Wide Temperature Operation: Functions efficiently in -5°C to +40°C ambient conditions, suitable for harsh industrial environments.
Applications:
Industrial Electrical Panels
Commercial Building Power Systems
Renewable Energy Installations
Main Technical Parameters
| Model | WSH3-10018model;WSH3-10027model |
| Rated Current In(A) | 32、40、50、63、80、100 |
| Poles | 1P、2P、3P、4P |
| Selective categories | AC-22A |
| NominalInsulation Voltage Ui(V) | 690 |
| Rated OperationalVoltage Ue(V) | AC230V/AC400V |
| Rated Impulse Withstandvoltage Uimp(kV) | 4 |
| Rated Short Time Current lcw(kA)/1S | 1.2 |
| Rated Short-Circuit AbilityIcm(kA) | 2 |
| Mechanical Endurance | 20000 |
| Electrical Endurance | 10000 |
Packaging and delivery
| Selling Units | Single item |
Lead time
| Quantity (pieces) | 1 – 1,000 | > 1,000 |
| Lead time (days) | 30 | To be negotiated |
Key attributes
| Rated Voltage | 230 V, 400 V |
| Material | Copper |
| Place of Origin | Zhejiang, China |
| Type | Switches |
| Model Number | WSH3-125 |
| Brand Name | Westhomes |
155 MBFREQUENTLY ASKED QUESTION (FAQ)
What is a 1P-4P Miniature Isolator Switch?
A 1P-4P Miniature Isolator Switch is a compact manual disconnect device designed to safely isolate electrical circuits from the power supply. It is commonly used in low-voltage distribution systems, control panels, and electrical enclosures for safe maintenance and circuit control.
What do 1P, 2P, 3P, and 4P mean on a Miniature Isolator Switch?
The terms 1P, 2P, 3P, and 4P refer to the number of poles in the isolator switch. A 1P isolator is typically used for single-phase circuits, 2P for phase and neutral isolation, 3P for three-phase systems, and 4P for three-phase systems requiring neutral disconnection.
What applications are suitable for a 1P-4P Miniature Isolator Switch?
A 1P-4P Miniature Isolator Switch is suitable for residential, commercial, and industrial low-voltage applications, including distribution boards, lighting circuits, control cabinets, machinery isolation, and power distribution systems.
What is the difference between a miniature isolator switch and an MCB?
A miniature isolator switch is mainly used for manual circuit disconnection and electrical isolation. An MCB provides automatic protection against overload and short-circuit faults. They perform different functions and are often installed together in electrical systems.
Can a 1P-4P Miniature Isolator Switch be used as a main switch?
Yes. A miniature isolator switch can be used as a main isolation switch in suitable electrical installations. It allows users to manually disconnect the power supply for maintenance, inspection, or emergency shutdown.
Does a Miniature Isolator Switch provide overload protection?
No. A miniature isolator switch does not provide overload or short-circuit protection. Its main function is to isolate and switch circuits manually. Additional protective devices, such as MCBs or MCCBs, should be installed when circuit protection is required.
Why choose a DIN rail Miniature Isolator Switch?
A DIN rail Miniature Isolator Switch provides a compact and convenient installation method. It can be easily mounted inside standard distribution boxes and electrical cabinets, helping save space and simplify wiring.
How do I choose the correct pole number for a Miniature Isolator Switch?
The correct pole number depends on the electrical system configuration. Single-phase applications usually require 1P or 2P models, while three-phase systems may require 3P or 4P models depending on whether neutral isolation is needed.
What rated current options are available for a 1P-4P Miniature Isolator Switch?
Miniature Isolator Switches are available in various rated current options to meet different load requirements. The appropriate current rating should be selected according to the circuit load, cable capacity, and installation requirements.
Why use a Miniature Isolator Switch in an electrical system?
A Miniature Isolator Switch provides a reliable method for manually disconnecting power and creating a safe isolation point. It improves maintenance safety, helps prevent accidental energization, and ensures convenient operation in low-voltage electrical applications.
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