3 Phase Surge Protection Device Unit with 8 Way Metal IP40 enclosure 40A RCBO
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £30+
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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...
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 |
When should I choose the RCBO version?
Choose this version when you want surge suppression, overcurrent protection, and earth leakage protection combined in one unit. It’s the best option for EV hubs, solar PV, and heat pump installs where compliance and reliability are critical.
What’s the benefit over the RCD version?
The RCD variant adds only leakage protection. The RCBO combines overcurrent + leakage in one device, simplifying wiring and saving board space.
Is this compliant with 18th Edition regs?
Yes – it meets BS 7671 Amendment 2 requirements, with a Type 2 SPD and a Type A RCBO included.
Does it include neutral and earth bars?
Yes – the board is supplied with neutral and earth bars fitted inside the enclosure.
How fast is delivery?
Units are pre-wired to order and normally dispatched within 3 working days. All boards are covered by a 2-year manufacturer warranty.
- Enclosure: 8-way steel, IP40 rated, surface mount
- SPD: 4-pole Type 2, 20kA/40kA
- RCBO: 40A, Type A, High Immunity, 30mA
- Neutral/Earth: Full bars included inside enclosure
- Pre-Wiring: Built and tested in the UK
- Compliance: BS EN 61439-3 · IEC 61643 · BS EN 61009-1 · BS 7671 Amd 2
This unit is built to order and pre-wired in our UK facility. Installation must be carried out by a qualified electrician.
- Mount vertically on a dry indoor surface using metal enclosure fixings
- Confirm earthing arrangement (TN-C-S or TT) before energising
- Rear and side knockouts provided for flexible cable entry
- SPD earth connection must be kept as short as possible
- Wiring schematic supplied inside the enclosure lid for reference
