4 Pole Modular Contactor – 125 A

The WAC4P125 is the most powerful model in our modular contactor range — a 4 Pole 125 A contactor built for reliable, noise-free switching of EV hubs, renewable energy systems, industrial lighting, and HVAC control panels. Designed for long service life, it delivers precise operation even under heavy, sustained loads.

This 4-pole unit provides complete phase and neutral isolation when required, fitting neatly on a 35 mm DIN rail inside modular enclosures and consumer units. It meets BS EN 61095 and BS EN 60947-4-1 standards for control and switching devices, ensuring full compliance with BS 7671 (18th Edition).

• Silent coil design – suitable for industrial and commercial environments
• 4-pole switching for full phase and neutral isolation
• DIN-rail mountable for standard modular boards
• Rated for AC-7a (resistive) and AC-1 (inductive) loads
• Complies with BS EN 61095 and BS EN 60947-4-1

Available Variants (4 Pole Range):

For lower current or single-phase systems, view our 2 Pole Modular Contactors or Rotary Isolators for supply isolation.

• Part Code: WAC4P125
• Type: Modular Contactor
• Configuration: 4 Pole
• Rated Current: 125 A
• Operational Voltage: 230 / 400 V AC 50 Hz
• Utilisation Category: AC-7a (resistive) / AC-1 (inductive)
• Protection: IP20 (BS EN 60529)
• Ambient Temperature: -25 °C to +40 °C
• Mounting: 35 mm DIN rail
• Recommended Torque: 2.0 Nm
• Compliance: BS EN 61095 / BS EN 60947-4-1

Mount on a 35 mm DIN rail within an IP-rated enclosure. Confirm the load current, cable capacity and coil voltage before energising the contactor.

• Rated 125 A – confirm circuit protection and cable sizing
• Ensure sufficient ventilation and clearance around the contactor
• Tighten terminals to 2 Nm torque
• Comply with BS 7671 and follow manufacturer installation guidance

Where is the WAC4P125 typically used?

It’s ideal for high-current switching in EV charging systems, solar arrays, HVAC plant and other heavy-duty control applications up to 125 A.

Can it isolate all poles including neutral?

Yes – the 4-pole configuration provides full phase and neutral isolation for maintenance or inspection purposes.

Is it quiet in operation?

Yes – the coil design ensures silent switching, suitable for both industrial and commercial boards.

Can it be used with protection devices?

Yes – pair with RCBOs, RCDs and SPDs for complete compliance and safety.

Is it compliant with UK regulations?

Fully compliant with BS EN 61095 and BS EN 60947-4-1 under BS 7671 (18th Edition) wiring standards.