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Pre-wired in the UK and tested before dispatch – allow up to 3 working days for shipping.
The WRCUSP440C is a ready-to-fit 3-Phase Surge Protection Device (SPD) Unit supplied in an 8-way IP40 steel enclosure. It includes a 4-pole Type 2 SPD (20kA/40kA) paired with a 40A Type A High Immunity RCBO, giving you full protection against surges, overcurrent, and earth leakage faults in one compact, compliant board. Built to BS 7671:2018 Amendment 2, this unit is the best all-round choice for EV charging, solar PV, heat pump systems, and industrial sites with sensitive electronic loads.
Installer Tip: The RCBO variant is the most comprehensive option. It combines the roles of MCB and RCD in one device, reducing wiring complexity and giving you total protection - a strong choice for EV hubs, renewables, and sites with harmonics or DC leakage risk.
Why Choose the 40A RCBO Variant?
The WRCUSP440C eliminates the need for separate MCB + RCD devices, simplifying the installation while maximising protection. This makes it:
- Comprehensive - protects against surges, overcurrent, and earth leakage
- High Immunity - reduced nuisance tripping on noisy inverter circuits
- Space-saving - all-in-one board with SPD + RCBO
- Compliant - built to BS EN 61009-1 and BS 7671 Amd 2
- Installer-friendly - pre-wired, labelled, and tested in the UK
Key Features
- 40A RCBO: Type A, High Immunity, 30mA
- Type 2 SPD: 4-pole, rated 20kA/40kA
- Enclosure: 8-way steel, IP40 surface mount
- Pre-wired in the UK: Built and tested before dispatch
- Compliance: BS EN 61439-3 · IEC 61643 · BS EN 61009-1 · BS 7671 Amd 2
Variant Comparison
| Variant | Protection Provided | Best For |
|---|---|---|
| 40A MCB | Overcurrent only | Circuits already RCD/RCBO protected |
| 63A MCB | Overcurrent only, higher load | Larger commercial/industrial installs |
| 40A RCD | 30mA High Immunity earth leakage | Adds RCD protection where only MCBs exist |
| 40A RCBO (This Product) | Overcurrent + 30mA High Immunity leakage (Type A) | Best for EV, solar & sensitive industrial loads |
Dimensions: (W)200mm x (H)232mm x (D)112mm
