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Type A RCBOs combine MCB and RCD protection in one device, protecting individual circuits against overload, short circuit and residual current faults. They are used in modern consumer units, EV charger circuits, heat pump supplies, appliance circuits and inverter-fed 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 provides combined overload, short-circuit and residual current protection for one circuit, while detecting both AC and pulsating DC residual current.
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.
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.
The WER32B-030 is a 32A B Curve High Immunity Type A RCBO, engineered for solar PV, battery storage, and EV-ready consumer units. It provides...
The WPRC40BSP is a weatherproof IP65 EV RCBO kit fitted with a 40A B Curve Type A RCBO and a factory-fitted Type 2 Surge...
The WRB132B-030 High Immunity Type A Mini RCBO is a 32A B Curve protective device designed for medium-load circuits in residential and light commercial...
The WRB116C-030 High Immunity Type A Mini RCBO is a 16A C Curve device designed to protect circuits with higher inrush currents. At just...
The WMRC40CSP is a 4 Way Metal EV Protection Unit that combines a 40 A C-Curve A-Type RCBO with a Type 2 SPD inside...
The WRT106C-030 is a 6A C Curve Type A RCBO combining residual current and overcurrent protection in one compact device. With switched live and...
Pre-wired in the UK and tested before dispatch – allow up to 3 working days for shipping. The WRCUSP440C is a ready-to-fit 3-Phase Surge...
The WER16B-030 is a 16A B Curve High Immunity Type A RCBO designed for solar PV, battery storage, and EV charger circuits. It provides...
The WRT116C-030 is a 16A C Curve Type A RCBO combining overcurrent and 30mA residual current protection in one slimline device. With switched live...
The WRT120B-030 is a 20A B Curve Type A RCBO that combines overcurrent and residual current protection in a single compact device. Featuring switched...
The WRT116B-030 is a 16A B Curve Type A RCBO combining residual current and overcurrent protection in one compact device. It features switched live...
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....
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.
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.
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.
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.
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.
$132.00 ex VAT
VAT: Product prices exclude VAT. VAT is added at checkout.
