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RCBO - Residual Current Breakers with Over-Current

Showing 361–380 of 396 results

Timeguard | TX2450C | C Curve | 6kA | Type A RCBO | 50A

Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
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SKU: TX2450C
£12.09

Timeguard | TX2425C | C Curve | 6kA | Type A RCBO | 25A

Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
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SKU: TX2425C
£12.09

Timeguard | TX2425 | B Curve | 6kA | Type A RCBO | 25A

Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
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SKU: TX2425
£12.09

Timeguard | TX2506 | B Curve | 6kA | Type A Bi-Directional RCBO | 6A

Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
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SKU: TX2506
£15.10

Timeguard | TX2510 | B Curve | 6kA | Type A Bi-Directional RCBO | 10A

Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
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SKU: TX2510
£15.10

Timeguard | TX2525 | B Curve | 6kA | Type A Bi-Directional RCBO | 25A

Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
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SKU: TX2525
£15.10

Timeguard | TX2506C | C Curve | 6kA | Type A Bi-Directional RCBO | 6A

Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
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SKU: TX2506C
£15.10

Timeguard | TX2510C | C Curve | 6kA | Type A Bi-Directional RCBO | 10A

Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
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SKU: TX2510C
£15.10

Timeguard | TX2516C | C Curve | 6kA | Type A Bi-Directional RCBO | 16A

Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
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SKU: TX2516C
£15.10

Timeguard | TX2520C | C Curve | 6kA | Type A Bi-Directional RCBO | 20A

Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
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SKU: TX2520C
£15.10

Timeguard | TX2525C | C Curve | 6kA | Type A Bi-Directional RCBO | 25A

Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
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SKU: TX2525C
£15.10

Timeguard | TX2532C | C Curve | 6kA | Type A Bi-Directional RCBO | 32A

Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
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SKU: TX2532C
£15.10

Timeguard | TX2540 | B Curve | 6kA | Type A Bi-Directional RCBO | 40A

Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
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SKU: TX2540
£15.10

Timeguard | TX2540C | C Curve | 6kA | Type A Bi-Directional RCBO | 40A

Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
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SKU: TX2540C
£15.10

Live Electrical | RKN340C-030 | 3P+N | Bi-Directional RCBO | Type A | Curve C | 30mA | 40A

Available to Order
Estimated Lead Time:
Usually 2 - 3 Working Days
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SKU: RKN340C-030
£48.41

WCED | WRT340C-030 | 40A C Curve | 10kA | 3 Pole A-Type Bi-Directional RCBO

Available to Order
Estimated Lead Time:
Usually 1 - 2 Working Days
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SKU: WRT340C-030
£57.26
FuseBox RTAM100B16BD 100mA Bi-Directional RCBO

FuseBox | RTAM100B16BD | 100mA | Curve B | Type A Bi-Directional Mini RCBO | 16A

Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
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SKU: RTAM100B16BD
£19.00
FuseBox RTAM100B20BD 100mA Bi-Directional RCBO

FuseBox | RTAM100B20BD | 100mA | Curve B | Type A Bi-Directional Mini RCBO | 20A

Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
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SKU: RTAM100B20BD
£19.00
FuseBox RTAM100B25BD 100mA Bi-Directional RCBO

FuseBox | RTAM100B25BD | 100mA | Curve B | Type A Bi-Directional Mini RCBO | 25A

Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
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SKU: RTAM100B25BD
£19.00

Live Electrical 3P+N 32A B Curve 30mA Type A RCBO

Out of Stock
Due back in September
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SKU: RTN332B-030N
£45.15

Showing 361–380 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.