4 Pole Modular Contactor – 20 A
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £30+
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The WAC4P20 is a compact 4 Pole 20 A modular contactor offering silent, reliable switching for lighting, HVAC, EV and automation applications. It’s DIN-rail mountable and suitable for both single and three-phase control circuits where noise-free operation is essential. Designed to fit modular enclosures and consumer units, it provides quiet...
The WAC4P20 is a compact 4 Pole 20 A modular contactor offering silent, reliable switching for lighting, HVAC, EV and automation applications. It’s DIN-rail mountable and suitable for both single and three-phase control circuits where noise-free operation is essential.
Designed to fit modular enclosures and consumer units, it provides quiet coil performance and a long mechanical life. Compliant with BS EN 61095 and BS EN 60947-4-1, the WAC4P20 ensures safe switching for resistive and inductive loads under the 18th Edition Wiring Regulations (BS 7671).
Installer Tip: Use the 4-pole 20 A model for multi-circuit lighting or control systems that require neutral disconnection or multiple pole isolation. Keep coil and load cables neatly segregated to reduce induced noise on sensitive circuits.
- Silent coil design – ideal for residential and commercial projects
- 4-pole configuration for three-phase or multi-circuit use
- DIN-rail mount for fast fit into boards and enclosures
- Compatible with AC-7a and AC-1 load categories
- Complies with BS EN 61095 and BS EN 60947-4-1
Available Variants (4 Pole Range):
| Part Code | Description | Rated Current (A) |
|---|---|---|
| WAC4P20 | 4 Pole Modular Contactor | 20 A |
| WAC4P25 | 4 Pole Modular Contactor | 25 A |
| WAC4P32 | 4 Pole Modular Contactor | 32 A |
| WAC4P40 | 4 Pole Modular Contactor | 40 A |
For single-phase applications, see our 2 Pole Modular Contactor range or Rotary Isolators for main switch options.
What is the WAC4P20 used for?
It provides multi-pole switching for lighting, HVAC and automation systems, handling resistive and inductive loads up to 20 A.
Can it be used for three-phase circuits?
Yes – the 4-pole configuration supports three-phase control with neutral disconnection if required.
Is it quiet in operation?
Yes – it uses a silent coil design, ideal for noise-sensitive areas such as residential and office installs.
Can it be paired with protection devices?
Yes – combine with RCBOs, RCDs and SPDs for full circuit protection.
Does it comply with UK standards?
Fully compliant with BS EN 61095 and BS EN 60947-4-1, meeting the 18th Edition requirements of BS 7671.
- Part Code: WAC4P20
- Type: Modular Contactor
- Configuration: 4 Pole
- Rated Current: 20 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 the WAC4P20 on a 35 mm DIN rail inside a suitable IP-rated enclosure. Ensure correct coil voltage and load rating before energising.
- Rated 20 A – confirm current and load type prior to installation
- Mount vertically for best heat dissipation
- Tighten terminals to 2 Nm torque
- Follow BS 7671 and manufacturer guidance
