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.
Type A RCBO – 6A B Curve, 30mA
£12.50
The WRT106B-030 is a 6A B Curve Type A RCBO providing combined residual current and overcurrent protection in one compact device. It features switched live and neutral disconnection for full isolation, bi-directional operation for solar PV and inverter-fed circuits, and a high immunity design to...
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.