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RCBO - Residual Current Breakers with Over-Current

Shop RCBO circuit breakers at Electrical4Less, including Type A, B Curve, C Curve, 6kA and 10kA options from brands such as FuseBox, Hager, Live Electrical, WCED, Niglon and GARO. RCBOs combine residual current protection with overload and short-circuit protection in one device, making them a common choice for individual circuit protection in modern consumer units and distribution boards. If you are also choosing a board, browse our main consumer units category and always check manufacturer compatibility before installation.

Showing 1–20 of 396 results

FuseBox RTA063230B 30mA Curve B 32A Type A RCBO

FuseBox | RTA063230B | 6kA | 30mA | Curve B | Type A RCBO | 32A
136 In Stock
More available within:
Usually 2 - 4 Working Days
Read More
SKU: RTA063230B
£9.99
FuseBox RTA060630B 30mA Curve B 6A Type A RCBO

FuseBox | RTA060630B | 6kA | 30mA | Curve B | Type A RCBO | 6A
105 In Stock
More available within:
Usually 2 - 4 Working Days
Read More
SKU: RTA060630B
£9.99
FuseBox RTA061630B 30mA Curve B 16A Type A RCBO

FuseBox | RTA061630B | 6kA | 30mA | Curve B | Type A RCBO | 16A
71 In Stock
More available within:
Usually 2 - 4 Working Days
Read More
SKU: RTA061630B
£9.99
FuseBox RTA062030B 30mA Curve B 20A Type A RCBO

FuseBox | RTA062030B | 6kA | 30mA | Curve B | Type A RCBO | 20A
80 In Stock
More available within:
Usually 2 - 4 Working Days
Read More
SKU: RTA062030B
£9.99
Live Electrical AMR132B-030 30mA Type A 32A 6kA B Curve Bi-Directional RCBOLive Electrical AMR132B-030 30mA Type A 32A 6kA B Curve Bi-Directional RCBO 2

Live Electrical | AMR132B-030 | 6kA 30mA | Type A B Curve | Bi-Directional RCBO | 32A
93 In Stock
More available within:
Usually 2 - 3 Working Days
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SKU: AMR132B-030
£8.22
Live Electrical AMR106B-030 30mA Type A 6A 6kA B Curve Bi-Directional RCBOLive Electrical AMR106B-030 30mA Type A 6A 6kA B Curve Bi-Directional RCBO 2

Live Electrical | AMR106B-030 | 6kA 30mA | Type A B Curve | Bi-Directional RCBO | 6A
88 In Stock
More available within:
Usually 2 - 3 Working Days
Read More
SKU: AMR106B-030
£8.22
Live Electrical 10kA RCBO 6A Curve B Type A 30mA 1P+N

Live Electrical 10kA RCBO 6A Curve B Type A 30mA 1P+N
4 In Stock
More available within:
Usually 2 - 3 Working Days
Read More
SKU: RA106B-030
£10.99
Live Electrical 10kA RCBO 16A Curve B Type A 30mA 1P+N

Live Electrical 10kA RCBO 16A Curve B Type A 30mA 1P+N
3 In Stock
More available within:
Usually 2 - 3 Working Days
Read More
SKU: RA116B-030
£10.99
Live Electrical AMR116B-030 30mA Type A 16A 6kA B Curve Bi-Directional RCBOLive Electrical AMR116B-030 30mA Type A 16A 6kA B Curve Bi-Directional RCBO 2

Live Electrical | AMR116B-030 | 6kA 30mA | Type A B Curve | Bi-Directional RCBO | 16A
80 In Stock
More available within:
Usually 2 - 3 Working Days
Read More
SKU: AMR116B-030
£8.22
WCED Type A Bi-Directional Curve B 6A 30mA RCBO - WRB106B-030

WCED Type A Bi-Directional Curve B 6A 30mA RCBO – WRB106B-030
8 In Stock
More available within:
Usually 1 - 2 Working Days
Read More
SKU: WRB106B-030
£10.00
Live Electrical 10kA RCBO 20A Curve B Type A 30mA 1P+N

Live Electrical 10kA RCBO 20A Curve B Type A 30mA 1P+N
4 In Stock
More available within:
Usually 2 - 3 Working Days
Read More
SKU: RA120B-030
£10.99
WCED Type A Bi-Directional Curve B 20A 30mA RCBO - WRB120B-030

WCED Type A Bi-Directional Curve B 20A 30mA RCBO – WRB120B-030
5 In Stock
More available within:
Usually 1 - 2 Working Days
Read More
SKU: WRB120B-030
£10.00
Live Electrical AMR120B-030 30mA Type A 20A 6kA B Curve Bi-Directional RCBOLive Electrical AMR120B-030 30mA Type A 20A 6kA B Curve Bi-Directional RCBO 2

Live Electrical | AMR120B-030 | 6kA 30mA | Type A B Curve | Bi-Directional RCBO | 20A
44 In Stock
More available within:
Usually 2 - 3 Working Days
Read More
SKU: AMR120B-030
£8.22
FuseBox RTAMB32BD Bi-Directional RCBO 32AFuseBox | RTAMB32BD | 30mA | Curve B | Type A Bi-Directional Mini RCBO | 32A

FuseBox | RTAMB32BD | 30mA | Curve B | Type A Bi-Directional Mini RCBO | 32A
7 In Stock
More available within:
Usually 2 - 4 Working Days
Read More
SKU: RTAMB32BD
£14.34
FuseBox RTA064030B 30mA Curve B 40A Type A RCBO

FuseBox | RTA064030B | 6kA | 30mA | Curve B | Type A RCBO | 40A
230 In Stock
More available within:
Usually 2 - 4 Working Days
Read More
SKU: RTA064030B
£9.99
FuseBox RTA061030B 30mA Curve B 10A Type A RCBO

FuseBox | RTA061030B | 6kA | 30mA | Curve B | Type A RCBO | 10A
124 In Stock
More available within:
Usually 2 - 4 Working Days
Read More
SKU: RTA061030B
£9.99
FuseBox RTAMB06BD Bi-Directional RCBO 6AFuseBox | RTAMB06BD | 30mA | Curve B | Type A Bi-Directional Mini RCBO | 6A

FuseBox | RTAMB06BD | 30mA | Curve B | Type A Bi-Directional Mini RCBO | 6A
13 In Stock
More available within:
Usually 2 - 4 Working Days
Read More
SKU: RTAMB06BD
£14.34
WCED Type A Bi-Directional Curve B 16A 30mA RCBO - WRB116B-030

WCED Type A Bi-Directional Curve B 16A 30mA RCBO – WRB116B-030
1 In Stock
More available within:
Usually 1 - 2 Working Days
Read More
SKU: WRB116B-030
£10.00
Live Electrical 10kA RCBO 16A Curve C Type A 30mA 1P+N

Live Electrical 10kA RCBO 16A Curve C Type A 30mA 1P+N
3 In Stock
More available within:
Usually 2 - 3 Working Days
Read More
SKU: RA116C-030
£10.99
Live Electrical AMR110B-030 30mA Type A 10A 6kA B Curve Bi-Directional RCBOLive Electrical AMR110B-030 30mA Type A 10A 6kA B Curve Bi-Directional RCBO 2

Live Electrical | AMR110B-030 | 6kA 30mA | Type A B Curve | Bi-Directional RCBO | 10A
125 In Stock
More available within:
Usually 2 - 3 Working Days
Read More
SKU: AMR110B-030
£8.22

Showing 1–20 of 396 results

RCBO Circuit Breakers for Consumer Units and Distribution Boards

RCBO circuit breakers are used to protect individual circuits within consumer units and distribution boards. They combine overcurrent protection with residual current protection, helping protect against overloads, short circuits and earth leakage faults from a single device.

Using individual RCBO protection can help reduce disruption compared with shared RCD protection. If a fault occurs on one circuit, the affected RCBO can disconnect that circuit without necessarily switching off other circuits in the board.

Choosing the Right RCBO

Before ordering an RCBO, check the technical requirements of the installation and confirm compatibility with the consumer unit or distribution board. Important details include:

  • Brand and board compatibility
  • Current rating, such as 6A, 16A, 20A, 32A, 40A or 50A
  • Breaking capacity, such as 6kA or 10kA
  • Tripping curve, usually B Curve or C Curve
  • Residual current type, such as Type A
  • Single pole, double pole or three-phase format
  • Terminal position and busbar compatibility

Popular RCBO Brands

Electrical4Less stocks RCBO circuit breakers from a range of manufacturers. If you prefer to browse by brand, view our FuseBox RCBO, Hager RCBO, Live RCBO and WCED RCBO ranges.

Key Types of RCBOs

Single Pole RCBOs

Single pole RCBOs are commonly used for individual final circuits such as lighting, socket circuits and smaller domestic loads. They are often used in residential consumer units where each circuit requires separate residual current and overcurrent protection.

Double Pole RCBOs

Double pole RCBOs disconnect both live and neutral conductors. They are commonly used where full circuit isolation is required, subject to the installation design and manufacturer requirements.

Three-Phase RCBOs

Three-phase RCBOs are used in suitable commercial and industrial installations where residual current and overcurrent protection is required for three-phase circuits.

Bi-Directional RCBOs

Bi-directional RCBOs are designed for circuits where current may flow in either direction. They are often selected for modern installations involving equipment such as solar PV, battery storage or EV charging, where specified by the system design and manufacturer guidance.

Type A RCBOs, B Curve and C Curve Options

Type A RCBOs detect AC residual currents and pulsating DC residual currents. They are commonly used in modern installations with electronic equipment such as LED lighting, computers, appliances with electronic controls and EV-related equipment where required by the installation design.

B Curve and C Curve refer to the overcurrent tripping characteristic of the device. B Curve RCBOs are commonly used for domestic and light commercial circuits with lower inrush currents, while C Curve RCBOs may be used for circuits with higher inrush currents, such as certain lighting, motor or commercial loads.

Type B RCBO or B Curve RCBO?

Type B RCBO and B Curve RCBO do not mean the same thing. Type B refers to the residual current detection type, including smooth DC residual current detection. B Curve refers to the overcurrent tripping curve. Always check the full product specification before ordering.

Related Consumer Unit Categories

If you are also choosing the enclosure or distribution board, browse our main consumer units category. For complete boards supplied with RCBO protection, view our RCBO consumer units range.

Installation Notes

RCBOs should be selected, installed and tested by a qualified electrician in accordance with current UK wiring regulations and the manufacturer’s instructions. Always confirm the correct rating, tripping curve, residual current type, breaking capacity, busbar arrangement and board compatibility before installation.

RCBO FAQs

What does an RCBO do?

An RCBO combines residual current protection and overcurrent protection in one device. It helps protect a circuit against earth leakage faults, overloads and short circuits.

Can I fit any RCBO into any consumer unit?

No. RCBOs should be compatible with the specific consumer unit or distribution board range. Always check the manufacturer’s compatibility information before installation.

What is the difference between B Curve and C Curve RCBOs?

B Curve and C Curve refer to the tripping characteristic of the RCBO. B Curve devices are commonly used for circuits with lower inrush currents, while C Curve devices are used where higher inrush currents may be expected.

What is a Type A RCBO?

A Type A RCBO detects AC residual current and pulsating DC residual current. It is commonly specified for many modern circuits with electronic equipment.

Who should install an RCBO?

RCBOs should be selected and installed by a qualified electrician who can confirm the correct rating, type, compatibility and installation requirements.






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Next Day Delivery

Cut-Off Time and Order Information
To ensure your order qualifies for next day delivery, please place your order by 3:00 PM. This is subject to all items being available on the shelf at the time of your order. For orders where the total value exceeds £200 + VAT (double our standard carriage-paid order value of £100 + VAT), we are happy to split the delivery into two shipments if some items are needed urgently and others are not immediately available. If you have any questions or need further assistance, feel free to reach out to us via WhatsApp for live support. We’re here to help!

In Stock Delivery Policy

Free Next-Day Delivery Over £100 + VAT:
Orders above £100 + VAT qualify for free next-day delivery via DPD for in-stock items. While we strive for timely dispatch, we recommend placing orders early to avoid potential delays. Once dispatched, unexpected issues may arise despite the courier’s efforts.

Orders Below £200 + VAT:
To keep costs manageable, we dispatch your order once all items are ready, including products with longer lead times.

Need items faster? You can pay for an additional delivery service to receive in-stock items sooner. Simply email us with your order details, and we’ll send you a payment link for the extra delivery cost.

Orders Above £200 + VAT:
For larger orders, we can split delivery at no extra cost. In-stock items will be sent immediately, with the remaining items dispatched once available.

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This item may be sourced from our supplier before dispatch.
The lead time shown is an estimate only and is based on the usual supplier timeframe. It is subject to supplier availability and is not a guaranteed delivery date.
We do not have a live supplier stock feed, so supplier stock can change without notice.
Delivery timers and courier estimates apply once the item is available for dispatch.
If the item is unavailable, we will contact you with the available options, including waiting for stock, choosing an alternative product, cancellation, or a refund for the unavailable item.
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Delivery info

If this item is not currently on our shelves, we will order it from FuseBox for delivery to our warehouse. FuseBox does not dispatch directly to our customers, so once the item arrives with us, we will send it on to you as quickly as possible. Many items reach us the next working day, while some may take a little longer. Delivery to you is usually completed within 2–4 working days.

Please note that if your order includes other products with a longer lead time, the complete order may be dispatched once all items are available.

In the unlikely event that an item becomes unavailable, we will contact you with the available options, which may include waiting for stock, choosing an alternative product or cancelling the unavailable item for a refund.

Delivery info

Orders containing only Live Electrical products that are not available from our shelf stock will usually be dispatched directly from Live Electrical. Delivery is generally completed within 2–3 working days, although stock availability, order cut-off times and courier schedules may affect the timing.

For mixed orders containing products from other suppliers, dispatch arrangements may vary, and the order may follow the longest delivery estimate shown.

In the unlikely event that an item becomes unavailable, we will contact you with the available options, which may include waiting for stock, choosing an alternative product or cancelling the unavailable item for a refund.

Delivery info

Where an order contains only WCED products that are not available from our shelf stock, it will usually be dispatched directly from WCED. Delivery often takes 1–2 working days, although stock availability, order cut-off times and courier schedules may affect the timing.

For mixed orders containing products from other suppliers, the dispatch arrangement and delivery time may vary, and the order may follow the longest lead time shown.

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