4 Pole Modular Contactor – 40 A
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £30+
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The WAC4P40 is a high-quality 4 Pole 40 A modular contactor designed for dependable, silent switching across lighting systems, HVAC controls, EV chargers and industrial automation circuits. It mounts directly to a 35 mm DIN rail and fits seamlessly within modular enclosures and consumer units. Suitable for both single- and...
The WAC4P40 is a high-quality 4 Pole 40 A modular contactor designed for dependable, silent switching across lighting systems, HVAC controls, EV chargers and industrial automation circuits. It mounts directly to a 35 mm DIN rail and fits seamlessly within modular enclosures and consumer units.
Suitable for both single- and three-phase use, the WAC4P40 offers long mechanical life and noise-free operation. It is fully tested to BS EN 61095 and BS EN 60947-4-1, ensuring safe and efficient performance under the 18th Edition Wiring Regulations (BS 7671).
Installer Tip: Select the 40 A model for three-phase distribution panels or large lighting banks requiring neutral disconnection. For critical HVAC and EV systems, pair with a dedicated RCBO to ensure simultaneous fault and isolation protection.
- Silent-coil design – ideal for residential and commercial applications
- 4-pole configuration for multi-phase or neutral-isolating systems
- DIN-rail mount for fast installation in boards and enclosures
- 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):
| Part Code | Description | Rated Current (A) |
|---|---|---|
| WAC4P32 | 4 Pole Modular Contactor | 32 A |
| WAC4P40 | 4 Pole Modular Contactor | 40 A |
| WAC4P63 | 4 Pole Modular Contactor | 63 A |
| WAC4P100 | 4 Pole Modular Contactor | 100 A |
Need single-phase control? Explore our 2 Pole Modular Contactor range or Rotary Isolators for main switch options.
What applications suit the WAC4P40?
It’s ideal for three-phase or multi-circuit systems such as lighting, HVAC, EV chargers and industrial control panels up to 40 A.
Can it isolate the neutral?
Yes – the 4-pole configuration allows full neutral disconnection if required for maintenance or inspection purposes.
Is it silent in operation?
Yes – it features a low-noise coil for quiet switching in residential and office environments.
Can it be used with protection devices?
Yes – pair with RCBOs, RCDs and SPDs for compliant circuit protection.
Is it compliant with UK standards?
Fully tested to BS EN 61095 and BS EN 60947-4-1 for use under the 18th Edition (BS 7671).
- Part Code: WAC4P40
- Type: Modular Contactor
- Configuration: 4 Pole
- Rated Current: 40 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 inside a suitable IP-rated enclosure. Check coil voltage and load rating before energising.
- Rated 40 A – confirm load and supply type prior to installation
- Mount vertically to aid heat dissipation
- Tighten terminals to 2 Nm torque
- Install to BS 7671 and manufacturer requirements
