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MCB Miniature Circuit Breakers MCBs — Miniature Circuit Breakers for Domestic & Commercial Installations RS Electrical Supplies stocks a wide range of MCBs (Miniature Circuit Breakers) for use...

MCBs — Miniature Circuit Breakers for Domestic & Commercial Installations

RS Electrical Supplies stocks a wide range of MCBs (Miniature Circuit Breakers) for use in consumer units and distribution boards across domestic, commercial, and light industrial applications. MCBs provide reliable overload and short circuit protection, automatically disconnecting a circuit when a fault is detected.

Choosing the Right MCB for Your Installation

MCBs are available in Type B, Type C, and Type D trip characteristics to suit different load types — Type B for standard domestic circuits, Type C for commercial loads with higher inrush currents, and Type D for specialist industrial equipment. Our range covers a variety of current ratings from 6A to 63A, including popular options such as 10A, 16A, 20A, 32A, and 50A, from trusted brands including BG, Fusebox, and Hager, compatible with their respective consumer unit and distribution board ranges. All products comply with BS EN 60898 and include single pole options where required.

Can't find the MCB you need? Contact us — we can source most circuit protection products on the market.

MCB Miniature Circuit Breakers MCBs — Miniature Circuit Breakers for Domestic & Commercial Installations RS Electrical Supplies stocks a wide range of MCBs (Miniature Circuit Breakers) for use...

MCBs — Miniature Circuit Breakers for Domestic & Commercial Installations

RS Electrical Supplies stocks a wide range of MCBs (Miniature Circuit Breakers) for use in consumer units and distribution boards across domestic, commercial, and light industrial applications. MCBs provide reliable overload and short circuit protection, automatically disconnecting a circuit when a fault is detected.

Choosing the Right MCB for Your Installation

MCBs are available in Type B, Type C, and Type D trip characteristics to suit different load types — Type B for standard domestic circuits, Type C for commercial loads with higher inrush currents, and Type D for specialist industrial equipment. Our range covers a variety of current ratings from 6A to 63A, including popular options such as 10A, 16A, 20A, 32A, and 50A, from trusted brands including BG, Fusebox, and Hager, compatible with their respective consumer unit and distribution board ranges. All products comply with BS EN 60898 and include single pole options where required.

Can't find the MCB you need? Contact us — we can source most circuit protection products on the market.

BG Circuit Protection B Curve MCB 6A CUMB6 — product view 2

BG Circuit Protection B Curve MCB 6A CUMB6

BG Electrical
£2.95 - £2.95
£2.95
£2.95 - £2.95
£2.95

This 6A MCB is to be used with BG Fortress Consumer Units for protection from short circuit and overload faults.

£2.95 - £2.95
£2.95
£2.95 - £2.95
£2.95
BG Circuit Protection B Curve MCB 32A CUMB32 — product view 2

BG Circuit Protection B Curve MCB 32A CUMB32

BG Electrical
£2.95 - £2.95
£2.95
£2.95 - £2.95
£2.95

This 32A MCB is to be used with BG Fortress Consumer Units for protection from short circuit and overload faults.

£2.95 - £2.95
£2.95
£2.95 - £2.95
£2.95
BG Circuit Protection B Curve MCB 40A CUMB40 — product view 2

BG Circuit Protection B Curve MCB 40A CUMB40

BG Electrical
£2.95 - £2.95
£2.95
£2.95 - £2.95
£2.95

This 40A MCB is to be used with BG Fortress Consumer Units for protection from short circuit and overload faults.

£2.95 - £2.95
£2.95
£2.95 - £2.95
£2.95
BG Circuit Protection B Curve MCB 50A CUMB50 — product view 2

BG Circuit Protection B Curve MCB 50A CUMB50

BG Electrical
£2.95 - £2.95
£2.95
£2.95 - £2.95
£2.95

This 50A MCB is to be used with BG Circuit Protection Consumer Units for protection from short circuit and overload faults.

£2.95 - £2.95
£2.95
£2.95 - £2.95
£2.95
BG Circuit Protection B Curve MCB 20A CUMB20 — product view 2

BG Circuit Protection B Curve MCB 20A CUMB20

BG Electrical
£2.95 - £2.95
£2.95
£2.95 - £2.95
£2.95

This 20A MCB is to be used with BG Fortress Consumer Units for protection from short circuit and overload faults.

£2.95 - £2.95
£2.95
£2.95 - £2.95
£2.95
BG Circuit Protection B Curve MCB 16A CUMB16 — product view 2

BG Circuit Protection B Curve MCB 16A CUMB16

BG Electrical
£2.95 - £2.95
£2.95
£2.95 - £2.95
£2.95

This 16A MCB is to be used with BG Fortress Consumer Units for protection from short circuit and overload faults.

£2.95 - £2.95
£2.95
£2.95 - £2.95
£2.95
BG Circuit Protection C Curve MCB 20A CUMC20 — product view 2

BG Circuit Protection C Curve MCB 20A CUMC20

BG Electrical
£3.95 - £3.95
£3.95
£3.95 - £3.95
£3.95

This 20A MCB is to be used with BG Fortress Consumer Units for protection from short circuit and overload faults.

£3.95 - £3.95
£3.95
£3.95 - £3.95
£3.95
BG Circuit Protection C Curve MCB 40A CUMC40 — product view 2

BG Circuit Protection C Curve MCB 40A CUMC40

BG Electrical
£3.95 - £3.95
£3.95
£3.95 - £3.95
£3.95

This 40A MCB is to be used with BG Fortress Consumer Units for protection from short circuit and overload faults.

£3.95 - £3.95
£3.95
£3.95 - £3.95
£3.95
BG Circuit Protection C Curve MCB 32A CUMC32 — product view 2

BG Circuit Protection C Curve MCB 32A CUMC32

BG Electrical
£3.95 - £3.95
£3.95
£3.95 - £3.95
£3.95

This 32A MCB is to be used with BG Fortress Consumer Units for protection from short circuit and overload faults.

£3.95 - £3.95
£3.95
£3.95 - £3.95
£3.95
BG Circuit Protection C Curve MCB 50A CUMC50 — product view 2

BG Circuit Protection C Curve MCB 50A CUMC50

BG Electrical
£3.95 - £3.95
£3.95
£3.95 - £3.95
£3.95

This 50A MCB is to be used with BG Fortress Consumer Units for protection from short circuit and overload faults.

£3.95 - £3.95
£3.95
£3.95 - £3.95
£3.95
BG Circuit Protection C Curve MCB 16A CUMC16 — product view 2

BG Circuit Protection C Curve MCB 16A CUMC16

BG Electrical
£3.95 - £3.95
£3.95
£3.95 - £3.95
£3.95

This 16A MCB is to be used with BG Fortress Consumer Units for protection from short circuit and overload faults.

£3.95 - £3.95
£3.95
£3.95 - £3.95
£3.95
FuseBox B40 miniature circuit breaker with a black switch handle in the O:OFF position, shown on a plain white background.
New

FuseBox 40A B Curve 6kA Single Pole MCB MT06B401

Fusebox
£2.95 - £2.95
£2.95
£2.95 - £2.95
£2.95

The FuseBox 40A B Curve 6kA Single Pole MCB MT06B401 provides overload and short-circuit protection for compatible FuseBox consumer units and distr...

View full details
£2.95 - £2.95
£2.95
£2.95 - £2.95
£2.95
BG Circuit Protection C Curve MCB 10A CUMC10 — product view 2

BG Circuit Protection C Curve MCB 10A CUMC10

BG Electrical
£3.95 - £3.95
£3.95
£3.95 - £3.95
£3.95

This 10A MCB is to be used with BG Fortress Consumer Units for protection from short circuit and overload faults.

£3.95 - £3.95
£3.95
£3.95 - £3.95
£3.95
BG Circuit Protection B Curve MCB 10A CUMB10 — product view 2

BG Circuit Protection B Curve MCB 10A CUMB10

BG Electrical
£2.95 - £2.95
£2.95
£2.95 - £2.95
£2.95

This 10A MCB is to be used with BG Fortress Consumer Units for protection from short circuit and overload faults.

£2.95 - £2.95
£2.95
£2.95 - £2.95
£2.95
BG Circuit Protection C Curve MCB 6A CUMC6 — product view 2

BG Circuit Protection C Curve MCB 6A CUMC6

BG Electrical
£3.95 - £3.95
£3.95
£3.95 - £3.95
£3.95

This 6A MCB is to be used with BG Fortress Consumer Units for protection from short circuit and overload faults.

£3.95 - £3.95
£3.95
£3.95 - £3.95
£3.95
BG Circuit Protection B Curve MCB 45A CUMB45 — product view 2

BG Circuit Protection B Curve MCB 45A CUMB45

BG Electrical
£3.25 - £3.25
£3.25
£3.25 - £3.25
£3.25

This 45A B curve MCB is for use with BG Fortress consumer units to provide protection against short-circuit and overload faults. The single-pole de...

View full details
£3.25 - £3.25
£3.25
£3.25 - £3.25
£3.25
BG Circuit Protection B Curve MCB 63A CUMB63 — product view 2

BG Circuit Protection B Curve MCB 63A CUMB63

BG Electrical
£3.25 - £3.25
£3.25
£3.25 - £3.25
£3.25

This 63A B curve MCB is for use with BG Fortress consumer units to provide protection against short-circuit and overload faults. The single-pole de...

View full details
£3.25 - £3.25
£3.25
£3.25 - £3.25
£3.25
BG Circuit Protection B Curve MCB 55A CUMB55 — product view 1

BG Circuit Protection B Curve MCB 55A CUMB55

BG Electrical
£3.25 - £3.25
£3.25
£3.25 - £3.25
£3.25

This 55A B curve MCB is for use with BG Fortress consumer units to provide protection against short-circuit and overload faults. The single-pole de...

View full details
£3.25 - £3.25
£3.25
£3.25 - £3.25
£3.25
FuseBox C50 miniature circuit breaker with a black switch handle in the OFF position, shown on a plain white background.
New

FuseBox 50A C Curve 6kA Single Pole MCB MT06C501

Fusebox
£3.36 - £3.36
£3.36
£3.36 - £3.36
£3.36

The FuseBox 50A C Curve 6kA Single Pole MCB MT06C501 provides overload and short-circuit protection for compatible FuseBox consumer units and distr...

View full details
£3.36 - £3.36
£3.36
£3.36 - £3.36
£3.36
FuseBox C63 miniature circuit breaker with a white plastic housing, black lever switch, and green indicator light, shown on a plain white background.
New

FuseBox 63A C Curve 6kA Single Pole MCB MT06C631

Fusebox
£3.79 - £3.79
£3.79
£3.79 - £3.79
£3.79

The FuseBox 63A C Curve 6kA Single Pole MCB MT06C631 provides overload and short-circuit protection for compatible FuseBox consumer units and distr...

View full details
£3.79 - £3.79
£3.79
£3.79 - £3.79
£3.79
FuseBox C40 miniature circuit breaker with a black switch handle in the OFF position, shown on a plain white background.
New

FuseBox 40A C Curve 6kA Single Pole MCB MT06C401

Fusebox
£3.36 - £3.36
£3.36
£3.36 - £3.36
£3.36

The FuseBox 40A C Curve 6kA Single Pole MCB MT06C401 provides overload and short-circuit protection for compatible FuseBox consumer units and distr...

View full details
£3.36 - £3.36
£3.36
£3.36 - £3.36
£3.36
FuseBox C25 miniature circuit breaker with a black switch handle in the OFF position, shown on a plain white background.
New

FuseBox 25A C Curve 6kA Single Pole MCB MT06C251

Fusebox
£3.36 - £3.36
£3.36
£3.36 - £3.36
£3.36

The FuseBox 25A C Curve 6kA Single Pole MCB MT06C251 provides overload and short-circuit protection for compatible FuseBox consumer units and distr...

View full details
£3.36 - £3.36
£3.36
£3.36 - £3.36
£3.36
FuseBax C20 MF00C051 AC circuit breaker with a black switch handle in the OFF position, shown on a plain white background.
New

FuseBox 20A C Curve 6kA Single Pole MCB MT06C201

Fusebox
£3.36 - £3.36
£3.36
£3.36 - £3.36
£3.36

The FuseBox 20A C Curve 6kA Single Pole MCB MT06C201 provides overload and short-circuit protection for compatible FuseBox consumer units and distr...

View full details
£3.36 - £3.36
£3.36
£3.36 - £3.36
£3.36
FuseBox B32 miniature circuit breaker with a black switch handle in the 0-Off position, shown on a solid white background.
New

FuseBox 32A B Curve 6kA Single Pole MCB MT06B321

Fusebox
£2.95 - £2.95
£2.95
£2.95 - £2.95
£2.95

The FuseBox 32A B Curve 6kA Single Pole MCB MT06B321 provides overload and short-circuit protection for compatible FuseBox consumer units and distr...

View full details
£2.95 - £2.95
£2.95
£2.95 - £2.95
£2.95

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