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.
4 Pole RCBO – 32A B Curve, Type A, 30mA (WCED WFR432B-030)
£37.19
The WCED WFR432B-030 is a 32A, B Curve, 4 Pole Type A RCBO designed for reliable protection in medium to high-load circuits. It combines overcurrent protection and earth leakage detection in one device, while the switched neutral ensures full isolation of all conductors for safer...
4 Pole RCBO – 20A B Curve, Type A, 30mA (WCED WFR420B-030)
£37.19
The WCED WFR420B-030 is a 20A, B Curve, 4 Pole Type A RCBO that provides combined protection against overcurrent, earth leakage, and arc faults. Its switched neutral design guarantees full isolation of all conductors, making it safer for testing, fault finding, and ongoing compliance with...
4 Pole RCBO – 16A B Curve, Type A, 30mA (WCED WFR416B-030)
£37.19
The WCED WFR416B-030 is a 16A, B Curve, 4 Pole Type A RCBO designed for dependable protection against overcurrent, earth leakage, and arc faults. With a switched neutral as standard, it isolates all conductors — ensuring maximum safety and compliance with BS 7671 (18th Edition)....
Pole RCBO – 10A B Curve, Type A, 30mA (WCED WFR410B-030)
£37.19
The WCED WFR410B-030 is a 10A, B Curve, 4 Pole Type A RCBO designed to protect single- and three-phase circuits against overcurrent, earth leakage, and arc faults. With a switched neutral, it ensures full isolation of all conductors for safer testing, maintenance, and fault protection....
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...
What Is an RCBO?
An RCBO (Residual Current Breaker with Overload) combines the protection of an RCD and MCB in one compact device. It trips when a circuit is overloaded, short-circuited, or when leakage current is detected – offering the highest level of circuit safety.
Types of RCBOs
- Type A – detects AC and pulsed DC faults; the UK standard for most new installations. Example: A-Type RCBO available in multiple ratings.
- Type B – provides protection against smooth DC faults, required for EV chargers, solar PV inverters, and heat pumps. See our 4-Pole RCBO for three-phase renewables.
- High Immunity – designed for circuits with electrical noise (common in industrial or renewable setups), reducing false tripping. Popular choice: 1-Module High Immunity RCBO.
Single vs Three Phase RCBOs
We supply both single-pole RCBOs for domestic circuits and three-phase RCBOs for commercial and industrial boards. Three-phase RCBOs are used in distribution panels where individual circuit protection is required across multiple phases.
Applications
- EV charging – ensures compliance with BS 7671 and manufacturer requirements.
- Heat pumps – protects sensitive inverter-driven equipment against leakage and overload.
- Solar PV & battery storage – covers DC leakage risks from renewable systems.
- Board upgrades – modernises older RCD/MCB setups with individual RCBO protection.
FAQs on RCBOs
What’s the difference between an RCD and an RCBO?
An RCD protects against earth leakage only, while an RCBO adds overload and short-circuit protection – combining both in one device.
Do I need a Type B RCBO?
If you’re installing EV chargers, heat pumps, or solar inverters, yes. Type B devices detect smooth DC currents which Type A devices may miss.
Why use RCBOs instead of a split-load RCD board?
RCBOs give each circuit its own protection. This avoids nuisance tripping that can cut power to multiple circuits at once, making them the preferred option for new builds.
Why Buy From Power & Data UK?
All RCBOs are UK stocked, BS EN compliant, and supplied with a 2-year warranty. Orders over £30 qualify for free next-day delivery, with Saturday delivery upgrades available. For returns, see our policy here.