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.
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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.
4 Way Metal EV Protection Unit – 32A B Curve A-Type RCBO + SPD (WMRC32BSP)
£34.80
WMRC32BSP is a 4 way metal EV protection unit supplied with a 32A B Curve A-Type RCBO and built-in surge protection. Designed for single-phase EV charger circuits, it provides overload, earth leakage, and surge protection in one compact pre-configured enclosure. Installer Tip: The dual switch...
IP65 EV RCBO Kit – 32A B Curve A Type + Surge Protection (WPRC32BSP)
£34.16
The WPRC32BSP is a weatherproof IP65 EV RCBO kit combining a 32A B Curve Type A RCBO with a factory-fitted Type 2 Surge Protection Device (SPD). Built into a robust plastic enclosure, it delivers overload, short circuit, earth leakage, and transient surge protection in one...
High Immunity RCBO – 20A B Curve, Type A, 30mA (WER20B-030)
£18.67
The WER20B-030 is a 20A B Curve High Immunity Type A RCBO designed for residential and light commercial circuits including solar PV, battery storage, and EV-ready boards. It combines overload, short-circuit, and 30mA residual current protection in one device, while its high immunity design helps...
A-Type RCBO EV Kit – 2 Way 6 A B Curve (WMEV206B)
£28.34
The WMEV206B is a 2-way A-Type RCBO EV Kit fitted with a 6 A B-curve high-immunity Type A RCBO. Designed specifically for EV charger supplies, it delivers overload, short-circuit and earth-leakage protection in line with 18th Edition Amendment 2 requirements (30 mA AC + 6...
High Immunity Type A 4 Pole RCBO – 32A (ADR432C-30)
£37.14
ADR432C-30 is a 32A high immunity Type A 4 pole RCBO designed for three-phase circuits where reliable overload, short-circuit, and residual current protection are required. With 30mA residual current protection, 6mA DC detection, and a 10kA breaking capacity, it is well suited to EV charger...
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.