Type A RCBOs for Modern Circuits & Inverter Loads
Type A RCBOs combine overcurrent and residual current protection in one device, making them a practical choice for modern circuits where space, compliance, and reliable fault protection all matter. They are commonly used on circuits serving EV chargers, heat pumps, appliances with electronic controls, and other loads where AC and pulsating DC residual currents may be present.
Compared with older Type AC devices, Type A RCBOs are better suited to today’s installations, especially where inverter-driven or electronically controlled equipment is involved.
Quick answer: A Type A RCBO is used where you need combined MCB and RCD protection on a single circuit, with detection of both AC and pulsating DC residual current. They are widely specified for modern domestic and commercial circuits, especially where electronic loads are involved.
Read more
This collection includes B and C curve Type A RCBOs in a range of current ratings, alongside options with different breaking capacities and high immunity performance depending on the circuit design. These devices are widely used in consumer units, upgraded boards, and specialist circuits where a standard RCBO needs to cope with more modern load characteristics.
- Type A residual current detection – suitable for AC and pulsating DC leakage
- B & C curve options – choose to suit circuit type and inrush profile
- 6kA & 10kA devices – for a range of domestic and commercial applications
- High immunity models available – useful where nuisance tripping is a concern
- Compact formats available – including space-saving options for tighter boards
Looking for a more specific variant? Browse our high immunity RCBOs, 10kA RCBOs, mini Type A RCBOs, or full RCBO range. For delivery and returns, see our delivery information and returns policy.
High Immunity Type A Mini RCBO – 40A B Curve (WRB140B-030)
£11.85
The WRB140B-030 High Immunity Type A Mini RCBO is a 40A B Curve protective device for residential and commercial circuits requiring higher current handling. At just 18mm wide, it combines overload, short-circuit, and residual current protection in a single compact module. With 30mA Type A...
High Immunity Type A Mini RCBO – 32A C Curve (WRB132C-030)
£11.85
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,...
8 Way IP65 Enclosure – 32A B Curve Type A RCBO + Surge Protection (WPRC32BSP/8)
£43.10
The WPRC32BSP/8 is an 8 way IP65 plastic enclosure fitted with a 32A B Curve Type A RCBO and integrated Type 2 Surge Protection Device (SPD). Designed for EV charge points, outdoor distribution circuits, and renewable installs, it provides overload, short-circuit, earth leakage, and surge...
IP65 EV Kit – 32A B Curve A-Type RCBO - WPEV232B
£32.05
The WPEV232B is a 32A B Curve A-Type RCBO EV Kit, pre-assembled in a tough IP65 weatherproof enclosure. It delivers full compliance for EV charging circuits and outdoor power, combining 30mA AC leakage protection with integrated 6mA DC residual current detection – a requirement of...
3 Way EV RCBO Enclosure – Type A High Immunity 32A Type B (WMEV332B)
£27.50
The WMEV332B is a compact 3-way EV RCBO enclosure designed to provide both earth leakage and overload protection for single-phase EV charging circuits. Fitted with a 32A Type A High Immunity RCBO (Type B curve), it offers full compliance with BS 7671:2018 Amendment 2 and...
Why Choose a Type A RCBO?
A Type A RCBO protects a circuit against both overload / short circuit faults and residual current faults in a single device. That makes it a practical, board-efficient option for individual circuit protection, especially in installations using modern equipment with electronic components, rectifiers, or inverter-driven loads.
What Type A Means
Type A refers to the residual current detection characteristic of the device. A Type A RCBO can detect alternating residual current and pulsating DC residual current, which makes it better suited than older Type AC devices for many modern circuits.
Where Type A RCBOs Are Commonly Used
- EV charger circuits – where modern protective device selection matters. See our EV kits.
- Heat pump supplies – particularly where electronically controlled equipment is involved. Browse heat pump boards.
- Modern domestic circuits – kitchens, utility circuits, outdoor power and appliance-fed circuits
- Commercial boards – where individual circuit protection and appropriate residual current characteristics are required
How to Choose the Right Type A RCBO
- Current rating – choose the amp rating to suit the circuit design
- B or C curve – B curve is common for standard circuits, while C curve may suit circuits with higher inrush
- 6kA or 10kA – select the breaking capacity required for the installation
- High immunity – useful on circuits where unwanted tripping could otherwise be an issue
- Physical format – compact and mini formats can help where board space is tight
Featured Type A RCBO Options
- Type A RCBO – WRT Range – a strong option for modern domestic and commercial circuits.
- Mini Type A High Immunity RCBO – compact format for tighter consumer unit layouts.
- Type A RCBO EV Kit with SPD – pre-configured protection for EV applications.
Type A RCBOs vs Other Protection Devices
Type A RCBOs sit alongside a wider range of circuit protection options. If you need broader product selection, browse our full RCBO range. For applications involving smooth DC residual current, you may need to consider Type B RCDs instead. Where nuisance tripping is the priority, our high immunity RCBOs may be the better fit.
FAQs on Type A RCBOs
What is a Type A RCBO?
A Type A RCBO is a protective device that combines MCB and RCD functions in one unit and detects both AC and pulsating DC residual current.
Why use Type A instead of Type AC?
Type A devices are generally better suited to modern circuits with electronic equipment, as they can detect pulsating DC residual current that older Type AC devices are not designed for.
What’s the difference between 6kA and 10kA RCBOs?
The difference is the device’s short-circuit breaking capacity. The correct choice depends on the fault level and design requirements of the installation.
Do I need a high immunity Type A RCBO?
High immunity can be useful where a circuit has background leakage or operating conditions that make nuisance tripping more likely.
Why Buy Type A RCBOs from Power & Data UK?
Power & Data UK supplies trade-focused circuit protection products with practical product choice, dependable UK stock, and fast dispatch. Orders over £30 qualify for free UK mainland next-day delivery, and products are backed by a 2-year manufacturer warranty. For unwanted items, see our returns policy.