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The WER40B-030 combines 40A B-curve overcurrent protection and 30mA Type A residual-current protection in one high-immunity RCBO, with switched live and neutral and separate handles to help identify the type of trip.
Combined protection with useful fault indication
For circuits specified with this rating and curve, the WER40B-030 brings overload, short-circuit and residual-current protection into a two-module device. Its Type A characteristic detects AC and pulsating DC residual currents.
- Separate MCB and RCD handles: Whitecliffe's twin-handle arrangement helps electricians distinguish an overcurrent trip from a residual-current trip when investigating a fault.
- Switched live and neutral: both conductors are disconnected when the device operates.
- 10kA breaking capacity: a documented rating to check against the circuit's prospective fault current.
- Bidirectional operation: supports circuit designs with power flow in either direction, subject to the equipment requirements and supplied connection instructions.
View the Whitecliffe WER technical datasheet (PDF) for the twin-handle explanation, electrical ratings and installation data.
Compare 40A RCBO options
Start with the specified current rating, curve, residual-current type and board compatibility. A change of curve or product range needs to match the circuit design.
| Product | Configuration | When to consider it |
|---|---|---|
| WER40B-030 — this product | 40A B curve; Type A, 30mA; two modules; 10kA | Your specification calls for the B-curve WER device with switched live and neutral and separate MCB/RCD handles. |
| WER40C-030 | 40A C curve; Type A, 30mA; two modules; 10kA | Your load characteristics and circuit design call for C curve. The current rating remains 40A. |
| WRB140B-030 mini RCBO | 40A B curve; Type A, 30mA; single-module WRB range | You are selecting a single-module format. Check the WRB ratings, dimensions and assembly compatibility before choosing it. |
B curve and Type B mean different things This product is a B-curve Type A RCBO. Where equipment requires Type B residual-current protection, choose from the appropriate Type B range instead. For EV, solar or heat-pump projects, match the complete protection arrangement to the equipment instructions.
Browse high-immunity RCBOs for other current ratings. Once WER40B-030 matches your specification, select the required quantity above to order.
Need a product check? Contact Power & Data UK with the RCBO code, board model and required rating so the team can check the relevant product information.
