RCBOs – Single & Three Phase
RCBOs (Residual Current Breaker with Overload) combine the functions of an RCD and MCB in a single device – protecting against both overloads and earth leakage faults. We stock Type A RCBOs, Type B DC-sensitive RCBOs, and High Immunity RCBOs in a wide range of ratings and configurations, with next-day UK delivery available.
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Available in single and three-phase options, our RCBOs are suitable for domestic, commercial, and industrial installations. They’re particularly recommended for EV chargers, heat pumps, and renewable energy systems, where sensitive inverter-driven loads demand advanced protection.
- Type A RCBOs – standard for most UK domestic installs
- Type B RCBOs – DC-sensitive, required for EVs, solar, and heat pumps
- High Immunity RCBOs – reduce nuisance tripping in noisy circuits
- Single & Three Phase RCBOs – cover all circuit types and loads
All RCBOs are BS EN 61009 compliant, backed by a 2-year warranty, and shipped from our UK warehouse. See our returns policy for easy returns.
High Immunity Type A Mini RCBO – 32A C Curve (WRB132C-030)
£11.67
The WRB132C-030 High Immunity Type A Mini RCBO is a 32A C Curve protective device engineered for circuits with higher inrush demands. Its slim 18mm design combines overload, short-circuit, and residual current protection in one module. With 30mA Type A sensitivity and a high-immunity build,...
High Immunity Type A Mini RCBO – 20A C Curve (WRB120C-030)
£11.67
The WRB120C-030 High Immunity Type A Mini RCBO is a 20A C Curve protective device designed for circuits with higher inrush currents. Compact at just 18mm wide, it combines short-circuit, overload, and residual current protection in one unit. With 30mA Type A sensitivity and high...
High Immunity Type A Mini RCBO – 10A B Curve (WRB110B-030)
£11.67
The WRB110B-030 High Immunity Type A Mini RCBO is a compact 10A B Curve protective device designed for domestic and commercial boards where space is limited. At just 18mm wide, it combines residual current and overcurrent protection in one module. With 30mA Type A sensitivity,...
Arc Fault Detection A-Type RCBO – WFD140B-030 (40A, B Curve, 30mA)
£103.40
The WFD140B-030 is a 40A, B Curve Arc Fault Detection (AFDD) RCBO, designed to deliver maximum protection against arc faults, earth leakage, overload, and short circuits in one compact unit. Built to BS 7671:2018 (18th Edition) standards, it provides fire-safe reliability for high-load domestic and...
Arc Fault Detection A-Type RCBO – WFD132B-030 (32A, B Curve, 30mA)
£103.40
The WFD132B-030 is a 32A, B Curve Arc Fault Detection (AFDD) RCBO, combining arc fault detection, 30mA Type A residual current protection, short-circuit, and overload protection in one compact unit. Fully compliant with BS 7671:2018 (18th Edition), it offers a reliable fire-safe solution for demanding...
Why Do Heat Pumps Need Special Consumer Units?
Heat pumps draw higher inrush currents and generate harmonic “noise” from their inverters. A dedicated consumer unit ensures safe operation and protects both the system and the property’s wider electrical installation.
Key Protections Explained
- Surge Protection (SPD) – defends the heat-pump inverter and control boards against transient overvoltage. Popular option: Heat Pump Consumer Unit WME-HP40C.
- Type A or B RCDs – Type B devices provide DC fault protection, recommended for inverter-driven systems. See our Heat Pump Type B RCD (WHP240-030).
- RCBOs – allow individual circuit protection, preventing one fault from taking out the whole supply. Explore our full RCBO range.
- IP-rated enclosures – protect against moisture and dust where heat pumps are mounted outdoors.
Compliant with 18th Edition Wiring Regs
All of our boards are BS EN 61439-3 certified and built for Amendment 2 of the 18th Edition. This ensures every install meets the latest UK wiring-safety standards – giving confidence to both installers and homeowners.
Applications
These units are suitable for:
- Air Source Heat Pumps – the most common retrofit option in UK homes
- Ground Source Heat Pumps – systems with higher current demand
- Hybrid installs – where heat pumps are paired with solar PV surge protection, three-phase boards, or EV charging
- Light commercial properties – offices, retail, or small industrial units using renewable heating
FAQs on Heat Pump Consumer Units
Do I need a separate consumer unit for a heat pump?
Yes – most installers recommend or require a dedicated board to meet regs and handle the electrical characteristics of heat pumps.
Should I use a Type A or Type B RCD?
Type A is the minimum standard, but Type B RCDs are strongly advised for heat pumps due to potential DC fault currents.
Can I connect solar and EV charging to the same board?
Yes – many of our heat pump boards are designed with additional ways for renewable system expansion.
Trusted UK Supply
All units are UK-stocked, backed by manufacturer warranties, and available with free next-day delivery on orders over £30. If you need to return an item, see our returns policy. For tailored advice, contact our technical team.