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The WAR440-030 is a 4 pole, 40A Type A RCD with high immunity, engineered to reduce nuisance tripping on circuits affected by surge currents or harmonics. Fully compliant with BS EN 61008-1 and BS EN 61008-2-1, it provides reliable residual current protection for three-phase distribution boards, EV charger installs, and other sensitive loads.
By using a high immunity design, this RCD maintains safety while filtering out brief disturbances that can cause standard Type A devices to trip unnecessarily. The 4-pole configuration ensures full protection across three-phase + neutral applications.
Installer Tip: Choose a high immunity Type A RCD where circuits include equipment with switching power supplies, drives, or frequent surge activity — such as EV chargers, HVAC systems, and LED lighting banks.
Key Features
- 40A, 4 Pole – suitable for three-phase + neutral applications
- High Immunity – reduces nuisance trips from harmonics and surges
- Type A sensitivity – detects AC and pulsed DC residual currents
- Compliant with BS EN 61008-1 & 61008-2-1
- Robust terminals and secure DIN rail mounting
- Compatible with three-phase distribution boards and EV-ready consumer units
Compare High Immunity RCD Variants
| Model | Poles | Rating | Immunity |
|---|---|---|---|
| WAR240-030 | 2 | 40A | High Immunity |
| WAR263-030 | 2 | 63A | High Immunity |
| WAR280-030 | 2 | 80A | High Immunity |
| WAR2100-030 | 2 | 100A | High Immunity |
| WAR440-030 (This Product) | 4 | 40A | High Immunity |
| WAR463-030 | 4 | 63A | High Immunity |
| WAR480-030 | 4 | 80A | High Immunity |
| WAR4100-030 | 4 | 100A | High Immunity |
