RCBOs
RCBOs provide combined overload, short-circuit and residual current protection for individual circuits. They are commonly used in consumer units and distribution boards where each circuit needs its own protective device instead of relying on shared RCD protection.
Browse Type A RCBOs, high immunity RCBOs, mini Type A RCBOs, 10kA RCBOs, EV RCBOs and three-phase RCBO options for domestic, commercial, EV, heat pump and inverter-fed circuits.
Quick answer: An RCBO combines MCB and RCD functions in one device, protecting a single circuit against overload, short circuit and earth leakage faults.
Read more about RCBO types and applications
- Type A RCBOs: for AC and pulsating DC residual current protection
- High immunity RCBOs: useful where nuisance tripping is a concern
- Mini RCBOs: compact options for tighter consumer units
- 10kA RCBOs: higher breaking capacity options for suitable installations
- EV and heat pump circuits: choose protection based on the equipment manufacturer’s requirements
Type A RCBO – 25A C Curve, 30mA
£14.50
The WRT125C-030 is a 25A C Curve Type A RCBO that delivers overcurrent and 30mA residual current protection in a single compact device. With switched live and neutral disconnection for full circuit isolation, bi-directional wiring for solar PV and inverter-fed setups, and high immunity electronics...
Type A RCBO – 25A B Curve, 30mA
£14.50
The WRT125B-030 is a 25A B Curve Type A RCBO combining residual current and overcurrent protection in one slim device. It features switched live and neutral disconnection for safe isolation, high immunity electronics to reduce nuisance trips, and bi-directional wiring suitable for solar PV, EV...
PME Fault Detection Consumer Unit – 4 Pole 63A RCBO with SPD, Load Balancing & kWh Meter (WMEPME12/LBK)
£192.95
The WMEPME12/LBK PME Fault Detection Consumer Unit is the largest model in the range, a 12-module steel enclosure combining a 2 Pole 40A or 63A Type A RCBO, B or C Curve, Type 2 SPD, PME load balancing relay, and an integrated kWh meter. It...
Type A RCBO – 6A B Curve, 30mA
£14.50
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...
PME Fault Detection Consumer Unit – 4 Pole 32A RCBO with SPD (WMEPME08/SP-C32)
£132.40
The WMEPME08/SP-C32 PME Fault Detection Consumer Unit is an 8-module metal board combining a 4 Pole 32A Type A RCBO with a Type 2 Surge Protection Device (SPD). It delivers full PME/PEN fault monitoring and automatic disconnection of Live, Neutral, and Earth within 5 seconds...
What Types of RCBO Are Available?
Different RCBO types are specified depending on the electrical characteristics of the installation and the connected equipment.
Type A RCBO
Type A RCBOs detect AC and pulsating DC earth leakage currents. They are the standard choice for most modern UK domestic installations and comply with 18th Edition requirements.
Type B / DC-Sensitive Protection
Some EV, solar and inverter-fed circuits may require protection capable of detecting smooth DC residual current. Where this is specified, check whether the installation requires a dedicated Type B RCD, a suitable RCBO arrangement, or another manufacturer-approved protective device.
High Immunity RCBO
High Immunity RCBOs are designed to reduce nuisance tripping in electrically noisy environments. They are commonly used in circuits supplying IT equipment, refrigeration systems and commercial installations.
Single Phase vs Three Phase RCBO
Single phase RCBOs are used in standard domestic consumer units. Three phase RCBOs are required in commercial or industrial installations where balanced multi-phase protection is needed.
When Should You Use an RCBO?
RCBOs are recommended when independent circuit protection is required. Unlike split-load RCD boards, each circuit is protected individually, meaning one fault does not disconnect the entire installation.
- Domestic rewires and new builds
- EV charger circuits
- Heat pump supplies
- Commercial distribution boards
- Circuits where discrimination is required
RCBO Standards & Compliance
RCBOs are typically manufactured to BS EN 61009. Always select the correct device type, current rating, breaking capacity and curve for the circuit design, connected equipment and consumer unit compatibility.