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The WMKB240BSP is a compact 4 way metal enclosure pre-fitted with a 40A B Curve MCB and Type 2 Surge Protection Device (SPD). Built for EV charger supplies, outbuildings, and small sub-mains, it combines overload protection and surge defence in a durable steel housing.
The 40A B Curve MCB makes this unit suitable for domestic EV installs, general distribution boards, and standard load circuits. With a pre-fitted Type 2 SPD, it ensures compliance with 18th Edition Amendment 2 and gives added resilience against transient overvoltages.
Installer Tip: Use the B Curve model for standard domestic circuits. If you expect higher inrush currents (motors, heat pumps, certain EV chargers), opt for the C Curve variant.
Key Features
- 40A B Curve MCB – protection against overloads and short-circuits
- Factory-fitted Type 2 SPD – compliance with 18th Edition surge protection requirements
- 4 way steel enclosure – robust, compact, and durable
- Supplied fully built – saves installation time
- Complies with BS EN 61439-3
Compare 4 Way MCB + SPD Enclosure Variants
| Model | Rating | Curve | Protection |
|---|---|---|---|
| WMKB240BSP (This Product) | 40A | B | MCB + SPD |
| WMKB240CSP | 40A | C | MCB + SPD |
