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The WER40B-030 is a 40A B Curve High Immunity Type A RCBO designed for heavier duty residential and commercial circuits, including solar PV, battery storage, and EV-ready consumer units. It combines overload, short-circuit, and 30mA residual current protection with enhanced resistance to nuisance tripping caused by harmonics or transient voltages.
With double pole disconnection and bi-directional wiring, this RCBO provides full compliance with the 18th Edition Wiring Regulations (Amendment 2) and safe operation in inverter-fed systems.
Installer Tip: The B Curve is suited for standard circuits with lower inrush currents. For EV chargers, motors, or heat pumps, use the C Curve version of this device.
Key Features
- 40A B Curve Type A RCBO – protects against overload and earth leakage
- High immunity electronics – resists nuisance trips
- 30mA sensitivity – compliant with Amendment 2
- 10kA breaking capacity – built for residential & commercial installs
- Double pole disconnection – isolates live + neutral conductors
- Bi-directional wiring – install either way round
- Meets BS EN 61009 & 18th Edition Wiring Regulations
Compare High Immunity RCBOs
| Model | Rating | Curve | Typical Use |
|---|---|---|---|
| WER06B-030 | 6A | B | Lighting and other low inrush final circuits |
| WER06C-030 | 6A | C | Low-rated circuits where higher inrush tolerance is preferred |
| WER16B-030 | 16A | B | General domestic final circuits with low inrush loads |
| WER16C-030 | 16A | C | Small motors and circuits with moderately higher inrush current |
| WER20B-030 | 20A | B | Domestic final circuits requiring a higher current rating |
| WER20C-030 | 20A | C | Circuits with moderately higher inrush current |
| WER32B-030 | 32A | B | Ring finals and other standard appliance circuits |
| WER32C-030 | 32A | C | Higher demand circuits and loads with greater inrush current |
| WER40B-030 (This Product) | 40A | B | Higher load circuits with lower inrush characteristics |
| WER40C-030 | 40A | C | Heavier-duty circuits with higher inrush conditions |
| WER63C-030 | 63A | C | Larger commercial or high-load applications |
