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Bi-Directional RCBOs

Bi-Directional RCBOs offer protection in both directions of current flow, making them ideal for solar PV systems, battery storage setups, and EV charging installations.

Our selection includes 1-pole, 2-pole, and 3-pole RCBOs for single-phase and three-phase applications, with options in 6kA and 10kA breaking capacities, as well as 30mA and 100mA trip sensitivities.

Choose from trusted brands such as FuseBox, Hager, Live Electrical, Garo, Niglon, and WCED – all compliant with the latest 18th Edition Wiring Regulations to ensure reliable overcurrent and earth leakage protection.

Use the filters to narrow down your selection by brand, pole type, or rating.

For all RCBO models, including standard and bi-directional types, visit our main RCBO category.

Showing 1–20 of 134 results

WCED Type A Bi-Directional Curve B 32A 30mA RCBO - WRB132B-030 WCED Type A Bi-Directional Curve B 32A 30mA RCBO - WRB132B-030 2

WCED | WRB132B-030 | Type A Bi-Directional RCBO | 6kA | 30mA | B Curve | 32A
28 In Stock
More available within:
Usually 1 - 2 Working Days
Read More
SKU: WRB132B-030
£10.00
WCED WRB106B-030 Bi-Directional RCBO

WCED | WRB106B-030 | Type A Bi-Directional RCBO | 6kA | 30mA | B Curve | 6A
29 In Stock
More available within:
Usually 1 - 2 Working Days
Read More
SKU: WRB106B-030
£10.00
WCED WRB120B-030 Bi-Directional RCBO

WCED | WRB120B-030 | Type A Bi-Directional RCBO | 6kA | 30mA | B Curve | 20A
2 In Stock
More available within:
Usually 1 - 2 Working Days
Read More
SKU: WRB120B-030
£10.00
FuseBox RTAMB32BD Bi-Directional RCBO 32A FuseBox | RTAMB32BD | 30mA | Curve B | Type A Bi-Directional Mini RCBO | 32A

FuseBox | RTAMB32BD | 30mA | Curve B | Type A Bi-Directional Mini RCBO | 32A
40 In Stock
More available within:
Usually 2 - 4 Working Days
Read More
SKU: RTAMB32BD
£14.34
FuseBox RTAMB06BD Bi-Directional RCBO 6A FuseBox | RTAMB06BD | 30mA | Curve B | Type A Bi-Directional Mini RCBO | 6A

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

WCED | WRB116B-030 | Type A Bi-Directional RCBO | 6kA | 30mA | B Curve | 16A
14 In Stock
More available within:
Usually 1 - 2 Working Days
Read More
SKU: WRB116B-030
£10.00
FuseBox RTAMB16BD Bi-Directional RCBO 16A FuseBox | RTAMB16BD | 30mA | Curve B | Type A Bi-Directional Mini RCBO | 16A

FuseBox | RTAMB16BD | 30mA | Curve B | Type A Bi-Directional Mini RCBO | 16A
27 In Stock
More available within:
Usually 2 - 4 Working Days
Read More
SKU: RTAMB16BD
£14.34
Live Electrical AMR132B-100 100mA Bi-Directional Type A Compact RCBO 32A B Curve Live Electrical AMR132B-100 100mA Bi-Directional Type A Compact RCBO 32A B Curve 2

Live Electrical | AMR132B-100 | 100mA Bi-Directional Type A Compact RCBO 32A B Curve
5 In Stock
This item cannot be back-ordered
SKU: AMR132B-100
£9.99
Live Electrical AMR140B-100 100mA Bi-Directional Type A Compact RCBO 40A B Curve Live Electrical AMR140B-100 100mA Bi-Directional Type A Compact RCBO 40A B Curve 2

Live Electrical | AMR140B-100 | 100mA Bi-Directional Type A Compact RCBO 40A B Curve
7 In Stock
More available within:
Usually 2 - 3 Working Days
Read More
SKU: AMR140B-100
£9.99
FuseBox RTAMB20BD Bi-Directional RCBO 20A FuseBox | RTAMB20BD | 30mA | Curve B | Type A Bi-Directional Mini RCBO | 20A

FuseBox | RTAMB20BD | 30mA | Curve B | Type A Bi-Directional Mini RCBO | 20A
24 In Stock
More available within:
Usually 2 - 4 Working Days
Read More
SKU: RTAMB20BD
£14.34
Live Electrical RNA40B-030 RCBO A Type DP Bi-Directional 40A B Curve 30mA

Live Electrical RNA40B-030 RCBO A Type DP Bi-Directional 40A B Curve 30mA
1 In Stock
More available within:
Usually 2 - 3 Working Days
Read More
SKU: RNA40B-030
£10.43
FuseBox RTAMB40BD Bi-Directional RCBO 40A FuseBox | RTAMB40BD | 30mA | Curve B | Type A Bi-Directional Mini RCBO | 40A

FuseBox | RTAMB40BD | 30mA | Curve B | Type A Bi-Directional Mini RCBO | 40A
26 In Stock
More available within:
Usually 2 - 4 Working Days
Read More
SKU: RTAMB40BD
£14.34
FuseBox RTAMC16BD Bi-Directional FuseBox | RTAMC16BD | 30mA | Curve C | Type A Bi-Directional Mini RCBO | 16A

FuseBox | RTAMC16BD | 30mA | Curve C | Type A Bi-Directional Mini RCBO | 16A
7 In Stock
More available within:
Usually 2 - 4 Working Days
Read More
SKU: RTAMC16BD
£14.34
Niglon RCBO1-32/30SAX2 32A RCBO – Type A, Curve B, 30mA, 6kA, Bi-Directional, Compact 18mm RCBO.

Niglon | RCBO1-32/30SAX2 | Type A Bi-Directional RCBO | 6kA | 30mA | B Curve | 32A
12 In Stock
More available within:
Usually 2 - 3 Working Days
Read More
SKU: RCBO1-32/30SAX2
£12.78
FuseBox RTAMC32BD Bi-Directional FuseBox | RTAMC32BD | 30mA | Curve C | Type A Bi-Directional Mini RCBO | 32A

FuseBox | RTAMC32BD | 30mA | Curve C | Type A Bi-Directional Mini RCBO | 32A
27 In Stock
More available within:
Usually 2 - 4 Working Days
Read More
SKU: RTAMC32BD
£14.34
Live Electrical RKA132B-030 10kA Type A B Curve Compact 32A Bi-Directional RCBO

Live Electrical | RKA132B-030 | 1P+N | Bi-Directional RCBO | Type A | Curve B | 10kA | 30mA | 32A
25 In Stock
More available within:
Usually 2 - 3 Working Days
Read More
SKU: RKA132B-030
£11.59
Live Electrical RNA40C-030 RCBO A Type DP Bi-Directional 40A C Curve 30mA

Live Electrical RNA40C-030 RCBO A Type DP Bi-Directional 40A C Curve 30mA
7 In Stock
More available within:
Usually 2 - 3 Working Days
Read More
SKU: RNA40C-030
£10.43
WCED WRB110B-030 Bi-Directional RCBO

WCED | WRB110B-030 | Type A Bi-Directional RCBO | 6kA | 30mA | B Curve | 10A
10 In Stock
More available within:
Usually 1 - 2 Working Days
Read More
SKU: WRB110B-030
£10.00
Live Electrical RKA106B-030 6A 10kA B Curve Compact Bi-Directional RCBO For TPN Distribution Boards

Live Electrical | RKA106B-030 | 1P+N | Bi-Directional RCBO | Type A | Curve B | 10kA | 30mA | 6A
18 In Stock
More available within:
Usually 2 - 3 Working Days
Read More
SKU: RKA106B-030
£11.59
Live Electrical RKA116B-030 10kA Type A B Curve Compact 16A Bi-Directional RCBO

Live Electrical | RKA116B-030 | 1P+N | Bi-Directional RCBO | Type A | Curve B | 10kA | 30mA | 16A
20 In Stock
More available within:
Usually 2 - 3 Working Days
Read More
SKU: RKA116B-030
£11.59

Showing 1–20 of 134 results

Understanding Bi-Directional RCBOs

Bi-Directional RCBOs represent a key advancement in circuit protection, offering reliable safety in both directions of current flow. Traditional RCBOs were designed primarily for current moving from the supply to the load, but as modern electrical systems evolved — with energy generation and storage becoming commonplace — this limitation needed to be addressed.

Why Bi-Directional RCBOs Were Introduced

With the rise of solar PV systems, EV chargers, and battery storage, current can flow back toward the supply side under certain conditions.
Standard RCBOs may not detect faults accurately in these situations, which led to the development of bidirectional designs — devices that sense and interrupt earth leakage and overcurrent faults regardless of current direction.

This makes them ideal for use in:

  • EV charging installations
  • Solar and battery hybrid systems
  • Smart homes with distributed power sources.

 

Compliance and BS 7671 Requirements

The 18th Edition Wiring Regulations (BS 7671) emphasise the importance of using suitable protective devices for circuits where current flow may reverse.
Bi-Directional RCBOs help ensure compliance with these standards, reducing the risk of faults in renewable and energy-efficient systems.

Their dual-direction sensing technology ensures protection for both installers and end users, helping future-proof electrical installations in line with Part 7: Section 722 (Electric Vehicle Charging Installations) and Regulation 712.411.3.2.1.1 (Solar PV Systems).

 

Frequently Asked Questions

What makes an RCBO bi-directional?

A bi-directional RCBO can detect and interrupt residual current faults in both directions of current flow — from supply to load and load to supply. This is vital in systems where current may reverse, such as solar PV or battery storage setups.

Do I need a bi-directional RCBO for my EV charger?

Yes, in most cases. BS 7671 (18th Edition) recommends using bi-directional protection for circuits that can export energy back into the system, which applies to many EV charging and renewable energy applications. It ensures the installation remains safe and compliant.

Are bi-directional RCBOs interchangeable with standard RCBOs?

Physically, they fit the same consumer units, but not all systems require them. Standard RCBOs protect only one direction of current flow, while bi-directional versions are designed for bidirectional power environments. Always check your manufacturer’s instructions and regulation requirements before replacing.






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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.

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

If this item is not currently available from our shelf stock, we will order it directly from Niglon and dispatch it as soon as it arrives with us. Delivery is usually completed within 2–3 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.

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