Type A RCBOs – Regulation-Compliant Protection
Our range of Type A RCBOs combines overcurrent and residual current protection in a single device, compliant with 18th Edition Amendment 2. Built for EV charger circuits, heat pumps, solar, and other inverter-driven loads, Type A devices detect AC and pulsating DC leakage that standard AC devices can miss.
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Available in 6A–50A ratings, with B or C curve options and both 6kA and 10kA breaking capacities, our Type A RCBOs cover everything from domestic installs to commercial boards. High immunity versions reduce nuisance trips, while 4-pole models ensure full disconnection in three-phase or sensitive applications.
- Amendment 2 compliant – required for EVs, heat pumps & inverter circuits
- High immunity options – designed to minimise false tripping
- 6kA & 10kA breaking capacity – for domestic and commercial installs
- B & C curve choices – match to circuit demand and inrush load
- Compact 1-module width – saves valuable board space
All RCBOs are UK-stocked, available for next-day delivery, and backed by a 2-year manufacturer warranty. See our returns policy for details.
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...
Choosing the Right Type A RCBO
When selecting a Type A RCBO, consider the circuit rating, curve type, and breaking capacity required for your install. Our range ensures compliance and flexibility for both new builds and retrofit work.
Key Considerations
- 6 kA vs 10 kA – 6 kA for most domestic installs, 10 kA for commercial or industrial boards.
- B vs C curve – B curve for standard domestic circuits, C curve for higher-inrush or inductive loads.
- High immunity – essential on circuits with background leakage such as EVs or heat-pump supplies.
- Pole count – 1-module single-pole + neutral or 4-pole options for three-phase installs.
Featured RCBOs
- Type A RCBO – WRT Range (6 – 50 A, 10 kA) – compact bi-directional devices for domestic and commercial installs.
- Mini Type A High Immunity RCBO (6 – 40 A) – 1-module design for tight consumer-unit applications.
- 4-Pole Type A RCBO (6 – 40 A) – ideal for three-phase and commercial setups.
- Type A RCBO EV Kit with SPD – pre-wired metal enclosure for EV-charger installs.
Trust & Compliance
All our Type A RCBOs are BS EN 61009 certified, tested for reliability, and manufactured to meet 18th Edition standards. With next-day delivery and a 2-year warranty, installers can fit with confidence knowing every unit is compliant and supported.
FAQs
Why use Type A instead of Type AC?
The 18th Edition requires Type A devices on circuits feeding EVs, heat pumps, solar inverters and similar loads. Type AC is no longer suitable for these applications.
What’s the difference between 6 kA and 10 kA?
6 kA is suitable for domestic consumer units. 10 kA devices are designed for commercial or industrial boards where fault levels are higher.
Do I need high immunity?
High-immunity RCBOs are recommended for installs where background leakage may otherwise cause nuisance trips – common with EV chargers and heat pumps.
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Need help choosing the right RCBO? Contact our technical team for expert advice before ordering.