Type B RCDs for EV, Solar & DC Fault Protection
Type B RCDs are specifically designed to detect smooth DC residual currents - essential for protecting EV chargers, solar inverters, battery systems, and frequency converters. Unlike Type A or AC variants, they cover the full spectrum of fault scenarios including high-frequency leakage, making them mandatory for certain installations under IEC 62423.
We stock 2-pole and 4-pole Type B RCDs alongside EV-ready protection kits, all fully compliant with 18th Edition regs. Whether you’re fitting a single charger or a 3-phase system with inverters, these units give you the fault coverage required to pass inspection and avoid nuisance trips.
- DC detection built in – smooth DC + high frequency protection
- Compliant with IEC 62423 – meets UK standards for EV and renewables
- Available in 2P and 4P options – for single-phase and 3-phase setups
- Ideal for EV chargers, solar, UPS and heat pumps
Need PME protection too? Explore our PME fault detection boards.
2 Pole B Type RCDs
£125.00
2 Pole B Type RCD WCED brand B-Type RCD provide protection against DC residual fault currents, and against AC residual fault currents up to 1000 hertz. They comply with IEC/EN 62423. Applications included:E.V & R.V installations, frequency converters, UPS installations, high-frequency Power converters, building site...
WME06/SP-B10063 - 6 Way Metal Unit with 100A B Type RCD & 63A MCB
£124.50
6 Module Steel Enclosure, 100A B Type RCD, 63A MCB. THIS UNIT IS BUILT TO ORDER, PLEASE ALLOW 3 DAYS FOR DELIVERY FROM DATE OF ORDER.
IP65 Weatherproof Enclosure EV Kit with 63A B-Type RCD + 40A C MCB
£135.97
63A RCD Plus 40A C curve MCB in Weatherproof IP65 Enclosure. This used especially for EV installations which require DC earth leakage detection. B-Type RCD & MCB to protect against smooth and pulsating DC leakage. Dimension: 140mm (H) x 205mm (W) x 95mm (D)
Heat Pump RCD -B Type 2 Pole - WHP240-030
£125.00
OUT OF STOCK UNITL END OF AUGUST. Please enquire if interested. The WHP B Type RCD is designed to detect and trip under smooth DC faults at any level. Tested to operate at frequencies above 20 kHz, with a minimum tripping threshold of 150 mA...
4 Pole B-Type RCDs
£158.30
4 Pole B Type RCD WCED brand B-Type RCD provide protection against DC residual fault currents, and against AC residual fault currents up to 1000 hertz. They comply with IEC/EN 62423. Applications included:E.V & R.V installations, frequency converters, UPS installations, high-frequency Power converters, building site...