4 Way Metal EV Protection Unit – 40A B Curve A-Type RCBO + SPD (WMRC40BSP)
18th Ed. Compliant
2-Year Warranty
UK Stock
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WMRC40BSP is a 4 way metal EV protection unit supplied with a 40A B Curve A-Type RCBO and built-in surge protection. Designed for EV charger circuits, it provides combined overload, earth leakage, and surge protection in one compact pre-configured enclosure. Installer Tip: The dual switch action indicates the type of...
WMRC40BSP is a 4 way metal EV protection unit supplied with a 40A B Curve A-Type RCBO and built-in surge protection. Designed for EV charger circuits, it provides combined overload, earth leakage, and surge protection in one compact pre-configured enclosure.
Installer Tip: The dual switch action indicates the type of fault detected, helping electricians identify whether the trip relates to overcurrent or earth leakage.
- 4 way metal enclosure – compact pre-built EV protection format
- 40A B Curve A-Type RCBO – suitable for dedicated single-phase EV charger circuits
- 30mA AC earth leakage protection
- 6mA DC earth leakage detection
- Built-in surge protection – helps protect connected equipment from transient overvoltages
- Pre-wired assembly – built for faster installation
- Dimensions: 110mm x 175mm x 91mm
This version is suited to EV installations requiring a 40A B Curve protective device with integrated surge protection in a single enclosure. You can also browse related options in our EV protection range, RCBO collection, and surge protection range.
| Model | RCBO Rating | Curve Type | SPD Type | Ingress Rating | Common Use |
|---|---|---|---|---|---|
| WMRC32BSP | 32 A | B Curve | Type 2 | IP40 (Metal) | Domestic EV charger ≤7.4 kW |
| WMRC40BSP | 40 A | B Curve | Type 2 | IP40 (Metal) | Higher-load EV charger ≤9.6 kW |
| WMRC32CSP | 32 A | C Curve | Type 2 | IP40 (Metal) | Commercial EV installations |
| WMRC40CSP | 40 A | C Curve | Type 2 | IP40 (Metal) | Heavier-duty or inverter loads |
This 40 A B-Curve version offers additional load capacity for high-demand EV chargers and larger single-phase circuits. Prewired, labelled, and built to 18th Edition standards for safe, reliable operation on site.
What does WMRC40BSP include?
WMRC40BSP includes a 4 way metal enclosure fitted with a 40A B Curve A-Type RCBO and built-in surge protection for EV charger circuits.
What earth leakage protection does it provide?
This unit provides 30mA AC earth leakage protection and 6mA DC earth leakage detection, making it suitable for EV applications where A-Type protection is required.
Why does the RCBO have dual switch action?
The dual switch action indicates the type of fault detected, helping installers identify whether the trip was caused by overcurrent or earth leakage.
Is this suitable for single-phase EV chargers?
Yes. This version is designed for single-phase EV charger circuits requiring a 40A B Curve A-Type RCBO with integrated surge protection.
Are other versions available?
Yes. Related models are available in 32A and 40A ratings, including B Curve and C Curve versions within the same product family.
- SKU: WMRC40BSP
- Product Type: 4 Way Metal EV Protection Unit with RCBO and Surge Protection
- RCBO Type: A-Type
- RCBO Rating: 40A B Curve
- Earth Leakage Protection: 30mA AC
- DC Leakage Detection: 6mA DC
- Surge Protection: Built-in surge protection
- Enclosure Format: 4 way metal unit
- Dimensions: 110mm x 175mm x 91mm
This unit is supplied pre-configured and should be installed by a qualified electrician in accordance with BS 7671 and the manufacturer’s instructions. It is intended for dedicated EV charger circuits requiring RCBO and surge protection in one assembly.
- Mount the enclosure vertically on a suitable solid surface
- Confirm the 40A B Curve rating is appropriate for the connected load
- Ensure all supply and outgoing conductors are terminated securely
- Check protective device operation during commissioning
- Do not modify the internal assembly unless permitted by the manufacturer
