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MCBs - Miniature Circuit Breakers

MCBs (Miniature Circuit Breakers)

What is an MCB?

MCB stands for Miniature Circuit Breaker. 

It's a small device designed to interrupt electrical flow when it detects abnormal conditions such as overload or short circuits. 

Essentially, it acts as a safety switch – protecting your electrical circuits and preventing potential hazards like fire or equipment damage.

How Do MCBs Work?

MCBs work by monitoring the flow of electricity through a circuit. 

When the current exceeds the MCB's rated capacity, or there's a short circuit, it trips - cutting off the power supply and preventing further damage.

Can I Change an MCB Myself?

Yes, MCBs are designed for easy installation and replacement. 

However, you’ll need to follow proper safety procedures and will need the knowledge and skills to handle electrical work safely. 

It's always best to consult a qualified electrician if you're unsure.

What Size MCB for Sockets?

The MCB's size depends on the electrical circuit's rating and the appliances connected to it. 

A 32A or 40A MCB is typically suitable for socket outlets commonly used in homes. 

However, you should consult electrical regulations and guidelines to pick the right size for your specific application.

Can MCBs Be Used for DC?

Yes, MCBs can be used for both AC (alternating current) and DC (direct current) circuits. 

However, you should choose MCBs specifically rated for DC applications to ensure you get the right protection and performance.

What Are the Types of MCB?

Various types of MCBs are available, including Type B, Type C, and Type D, each designed to trip at different levels of overload or short circuit currents.

What is the Tripping Mechanism of an MCB?

The tripping mechanism of an MCB is typically based on either thermal or magnetic principles. 

Thermal MCBs respond to the heat generated by overcurrent, while magnetic MCBs detect sudden surges in current. 

Some MCBs feature both mechanisms for better protection.

Where Are MCBs Installed?

MCBs are installed in electrical distribution boards, consumer units, or fuse boxes to protect individual circuits or groups of circuits within a building. 

They are commonly found in residential, commercial, and industrial settings.

Can I Reset an MCB?

Yes, most MCBs feature a reset function that allows you to restore power to the circuit after it has tripped. 

Simply switch the MCB back to the "on" position after fixing the cause of the trip.

Invest in quality MCBs today to ensure the safety and reliability of your electrical installations. 

Browse our selection of MCBs to find the perfect solution for your needs!

Filters

  • £10.56 - £10.56
    £10.56 inc VAT
    £10.56 - £10.56
    £10.56 inc VAT
    £8.80 ex VAT

    Siemens 5SY4132-7 MCB SP Type C 32A 10Ka

    Miniature circuit breaker 230/400 V 10kA, 1-pole, C, 32 A, D=70 mm The miniature circuit breaker is the fuse for short-circuit protection. The mini...

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    £10.56 - £10.56
    £10.56 inc VAT
    £10.56 - £10.56
    £10.56 inc VAT
    £8.80 ex VAT
  • £161.06 - £161.06
    £161.06 inc VAT
    £161.06 - £161.06
    £161.06 inc VAT
    £134.22 ex VAT

    Schneider A9C65316 Reflex iC60H Ti24 16 A 3P Curve C Integrated Control MCB

    This Acti 9 Reflex iC60H is a low voltage integrated control circuit breaker. It combines integrated circuit breaker protection and load control fo...

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    £161.06 - £161.06
    £161.06 inc VAT
    £161.06 - £161.06
    £161.06 inc VAT
    £134.22 ex VAT
  • £17.93 - £17.93
    £17.93 inc VAT
    £17.93 - £17.93
    £17.93 inc VAT
    £14.94 ex VAT

    Schneider A9N17522 IDPN Circuit Breaker 1p+N, 32A B Curve

    £17.93 - £17.93
    £17.93 inc VAT
    £17.93 - £17.93
    £17.93 inc VAT
    £14.94 ex VAT
  • £43.87 - £43.87
    £43.87 inc VAT
    £43.87 - £43.87
    £43.87 inc VAT
    £36.56 ex VAT

    Schneider A9N18404 Merlin Gerin C120H Circuit Breaker 1 Pole 125A B-Curve

    This Acti9 C120H is a low voltage multistandard miniature circuit breaker (MCB). It is a 1P circuit breaker with 1 protected pole, 125A rated curre...

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    £43.87 - £43.87
    £43.87 inc VAT
    £43.87 - £43.87
    £43.87 inc VAT
    £36.56 ex VAT
  • £105.43 - £105.43
    £105.43 inc VAT
    £105.43 - £105.43
    £105.43 inc VAT
    £87.86 ex VAT

    Schneider A9N18511 Merlin Gerin C120H Circuit Breaker 3 Pole 63A D Curve

    This Acti9 C120H is a low voltage multistandard miniature circuit breaker (MCB). It is a 3P circuit breaker with 3 protected poles, 63A rated curre...

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    £105.43 - £105.43
    £105.43 inc VAT
    £105.43 - £105.43
    £105.43 inc VAT
    £87.86 ex VAT
  • £1.10 - £1.10
    £1.10 inc VAT
    £1.10 - £1.10
    £1.10 inc VAT
    £0.92 ex VAT

    Schneider DOM10B6 Domae Style Miniature Circuit Breaker Curve B 10A SP 230-240V AC

    Schneider Electric DOM10B6 1 Pole 10A B curve domae style circuit breaker with thermal magnetic trip unit technology. It features 230 to 240V AC ra...

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    £1.10 - £1.10
    £1.10 inc VAT
    £1.10 - £1.10
    £1.10 inc VAT
    £0.92 ex VAT
  • £6.86 - £6.86
    £6.86 inc VAT
    £6.86 - £6.86
    £6.86 inc VAT
    £5.72 ex VAT

    Crabtree 70B/06 MCB (1 Module Width) B6 16kA 1P

    Crabtree - Wiring Accessories 70B/06 Polestar Compact MCB SP Type B 6A 16kA • B curve trip characteristic (3-5In) • 16kA to BS EN 60898-1 (15kA to ...

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    £6.86 - £6.86
    £6.86 inc VAT
    £6.86 - £6.86
    £6.86 inc VAT
    £5.72 ex VAT
  • £51.56 - £51.56
    £51.56 inc VAT
    £51.56 - £51.56
    £51.56 inc VAT
    £42.97 ex VAT

    Eaton 101QB MCB SP Type 1 10A

    101QB • Complete and configurable enclosures MCBs, MCCBs, ACBs

    £51.56 - £51.56
    £51.56 inc VAT
    £51.56 - £51.56
    £51.56 inc VAT
    £42.97 ex VAT
  • £2.02 - £2.02
    £2.02 inc VAT
    £2.02 - £2.02
    £2.02 inc VAT
    £1.68 ex VAT

    Eaton EAD06B Miniature Circuit Breaker (MCB) Single Pole Type B 6A Grey

    These 6kA MCBs are fitted with box clamp terminals suitable for use with cables up to 25 mm². The type-B breaker is suitable for general • DIN rail...

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    £2.02 - £2.02
    £2.02 inc VAT
    £2.02 - £2.02
    £2.02 inc VAT
    £1.68 ex VAT
  • £2.50 - £2.50
    £2.50 inc VAT
    £2.50 - £2.50
    £2.50 inc VAT
    £2.08 ex VAT

    Eaton EAD32B Miniature Circuit Breaker MCB Single Pole Type B 32A Grey

    These 6kA MCBs are fitted with box clamp terminals suitable for use with cables up to 25 mm². The type-B breaker is suitable for general • DIN rail...

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    £2.50 - £2.50
    £2.50 inc VAT
    £2.50 - £2.50
    £2.50 inc VAT
    £2.08 ex VAT
  • £2.60 - £2.60
    £2.60 inc VAT
    £2.60 - £2.60
    £2.60 inc VAT
    £2.17 ex VAT

    Eaton EAD10B Miniature Circuit Breaker (MCB) SP Type B 10A Grey

    Miniature circuit breaker (MCB) • DIN rail mountable • Toggle position for positive contact indication • Selectivity Class 3 • Calibration temperat...

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    £2.60 - £2.60
    £2.60 inc VAT
    £2.60 - £2.60
    £2.60 inc VAT
    £2.17 ex VAT
  • £23.35 - £23.35
    £23.35 inc VAT
    £23.35 - £23.35
    £23.35 inc VAT
    £19.46 ex VAT

    Eaton EAD25BH30C Electronic RCD/MCB Combination 25A 30mA MCB trip characteristic: B 1p RCD trip characteristic: AC

    Electronic residual current operated circuit-breaker with overcurrent protection; 25A; 30mA; miniature circuit-breaker characteristic curve: B; 1p;...

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    £23.35 - £23.35
    £23.35 inc VAT
    £23.35 - £23.35
    £23.35 inc VAT
    £19.46 ex VAT
  • £23.35 - £23.35
    £23.35 inc VAT
    £23.35 - £23.35
    £23.35 inc VAT
    £19.46 ex VAT

    Eaton EAD45BH30C Electronic RCD/MCB Combination 45A 30mA MCB trip characteristic: B 1p RCD trip characteristic: AC

    Electronic residual current operated circuit-breaker with overcurrent protection; 45A; 30mA; miniature circuit-breaker characteristic curve: C; 1p;...

    View full details
    £23.35 - £23.35
    £23.35 inc VAT
    £23.35 - £23.35
    £23.35 inc VAT
    £19.46 ex VAT
  • £37.86 - £37.86
    £37.86 inc VAT
    £37.86 - £37.86
    £37.86 inc VAT
    £31.55 ex VAT

    Eaton EMBH313 MCB TP Type B 13A 10/15Ka

    EM miniature circuit-breaker, 3 pole, trip type: B, rated operational current In: 13 A, rated switching capacity according to IEC/EN 60947-2: 15 kA...

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    £37.86 - £37.86
    £37.86 inc VAT
    £37.86 - £37.86
    £37.86 inc VAT
    £31.55 ex VAT
  • £22.01 - £22.01
    £22.01 inc VAT
    £22.01 - £22.01
    £22.01 inc VAT
    £18.34 ex VAT

    Hager NBN350N MCB 3 Pole 10kA/15kA Type B 50A 3M

    The NBN350N is a 50A triple pole 10kA B Curve MCB from Hager. It is part of the NBN Range triple pole circuit breaker provides protection and contr...

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    £22.01 - £22.01
    £22.01 inc VAT
    £22.01 - £22.01
    £22.01 inc VAT
    £18.34 ex VAT
  • £1.54 - £1.54
    £1.54 inc VAT
    £1.54 - £1.54
    £1.54 inc VAT
    £1.28 ex VAT

    MK Electric H5906S MCB Single Pole Type B 6A 6kA 230V 1 Module

    This is a Miniature Circuit Breaker, thermo -magnetic, current limiting type and are available with Type B operating characteristics. MCB operating...

    View full details
    £1.54 - £1.54
    £1.54 inc VAT
    £1.54 - £1.54
    £1.54 inc VAT
    £1.28 ex VAT
  • £9.61 - £9.61
    £9.61 inc VAT
    £9.61 - £9.61
    £9.61 inc VAT
    £8.01 ex VAT

    Schneider C60HD120 MCB SP Type D 20A 15KA

    £9.61 - £9.61
    £9.61 inc VAT
    £9.61 - £9.61
    £9.61 inc VAT
    £8.01 ex VAT
  • £15.01 - £15.01
    £15.01 inc VAT
    £15.01 - £15.01
    £15.01 inc VAT
    £12.51 ex VAT

    Schneider A9F44163 MCB Acti9 iC60N 1p 63A C Miniature Circuit Breaker

    ACTI9 IC60N 1P 63A C MCB • This Acti9 iC60N is a low voltage miniature circuit breaker (MCB). • It is a 1P circuit breaker with 1 protected pole, 6...

    View full details
    £15.01 - £15.01
    £15.01 inc VAT
    £15.01 - £15.01
    £15.01 inc VAT
    £12.51 ex VAT
  • £62.31 - £62.31
    £62.31 inc VAT
    £62.31 - £62.31
    £62.31 inc VAT
    £51.93 ex VAT

    Schneider A9F44316 MCB Acti9 iC60N 3p 16A C Miniature Circuit Breaker

    ACTI9 IC60N 3P 16A C MCB • This Acti9 iC60N is a low voltage miniature circuit breaker (MCB). • It is a 3P circuit breaker with 3 protected poles, ...

    View full details
    £62.31 - £62.31
    £62.31 inc VAT
    £62.31 - £62.31
    £62.31 inc VAT
    £51.93 ex VAT
  • Sold out
    £4.16 - £4.16
    £4.16 inc VAT
    £4.16 - £4.16
    £4.16 inc VAT
    £3.47 ex VAT

    Volex VB16-B MCB Single Pole Type B 16A 6Ka

    Volex VB Miniature Circuit Breaker is a single pole type B MCB for Volex consumer units. It is suitable for use in domestic household premises. • 1...

    View full details
    £4.16 - £4.16
    £4.16 inc VAT
    £4.16 - £4.16
    £4.16 inc VAT
    £3.47 ex VAT
    Sold out
  • Sold out
    £5.64 - £5.64
    £5.64 inc VAT
    £5.64 - £5.64
    £5.64 inc VAT
    £4.70 ex VAT

    Volex VB06-B MCB Single Pole Type B 6A 6Ka

    Volex VB Miniature Circuit Breaker is a single pole type B MCB for Volex consumer units. It is suitable for use in domestic household premises. • 6...

    View full details
    £5.64 - £5.64
    £5.64 inc VAT
    £5.64 - £5.64
    £5.64 inc VAT
    £4.70 ex VAT
    Sold out
  • £10.31 - £10.31
    £10.31 inc VAT
    £10.31 - £10.31
    £10.31 inc VAT
    £8.59 ex VAT

    Crabtree 6HT06C MCB (3 Module Width) C6 10kA 3P

    Crabtree Loadstar Miniature Circuit Breaker suitable for use within Loadstar distribution boards. It is compliant with BS EN 60898 and EN 60947-2 c...

    View full details
    £10.31 - £10.31
    £10.31 inc VAT
    £10.31 - £10.31
    £10.31 inc VAT
    £8.59 ex VAT
  • £9.47 - £9.47
    £9.47 inc VAT
    £9.47 - £9.47
    £9.47 inc VAT
    £7.89 ex VAT

    Crabtree 6HT50C MCB (3 Module Width) C50 10kA 3P

    Crabtree Loadstar Miniature Circuit Breaker is suitable for use in standard type B distribution boards and TP type A distribution boards. • C curve...

    View full details
    £9.47 - £9.47
    £9.47 inc VAT
    £9.47 - £9.47
    £9.47 inc VAT
    £7.89 ex VAT
  • £28.25 - £28.25
    £28.25 inc VAT
    £28.25 - £28.25
    £28.25 inc VAT
    £23.54 ex VAT

    Crabtree 73C/20 MCB (3 Module Width) C20 16kA 3P

    C curve trip characteristic (5-10In) • 16kA to BS EN 60898-1 (15kA to BS EN 60947-2) • Triple pole MCB • Energy limiting Class 3

    £28.25 - £28.25
    £28.25 inc VAT
    £28.25 - £28.25
    £28.25 inc VAT
    £23.54 ex VAT

MCBs (Miniature Circuit Breakers)

What is an MCB?

MCB stands for Miniature Circuit Breaker. 

It's a small device designed to interrupt electrical flow when it detects abnormal conditions such as overload or short circuits. 

Essentially, it acts as a safety switch – protecting your electrical circuits and preventing potential hazards like fire or equipment damage.

How Do MCBs Work?

MCBs work by monitoring the flow of electricity through a circuit. 

When the current exceeds the MCB's rated capacity, or there's a short circuit, it trips - cutting off the power supply and preventing further damage.

Can I Change an MCB Myself?

Yes, MCBs are designed for easy installation and replacement. 

However, you’ll need to follow proper safety procedures and will need the knowledge and skills to handle electrical work safely. 

It's always best to consult a qualified electrician if you're unsure.

What Size MCB for Sockets?

The MCB's size depends on the electrical circuit's rating and the appliances connected to it. 

A 32A or 40A MCB is typically suitable for socket outlets commonly used in homes. 

However, you should consult electrical regulations and guidelines to pick the right size for your specific application.

Can MCBs Be Used for DC?

Yes, MCBs can be used for both AC (alternating current) and DC (direct current) circuits. 

However, you should choose MCBs specifically rated for DC applications to ensure you get the right protection and performance.

What Are the Types of MCB?

Various types of MCBs are available, including Type B, Type C, and Type D, each designed to trip at different levels of overload or short circuit currents.

What is the Tripping Mechanism of an MCB?

The tripping mechanism of an MCB is typically based on either thermal or magnetic principles. 

Thermal MCBs respond to the heat generated by overcurrent, while magnetic MCBs detect sudden surges in current. 

Some MCBs feature both mechanisms for better protection.

Where Are MCBs Installed?

MCBs are installed in electrical distribution boards, consumer units, or fuse boxes to protect individual circuits or groups of circuits within a building. 

They are commonly found in residential, commercial, and industrial settings.

Can I Reset an MCB?

Yes, most MCBs feature a reset function that allows you to restore power to the circuit after it has tripped. 

Simply switch the MCB back to the "on" position after fixing the cause of the trip.

Invest in quality MCBs today to ensure the safety and reliability of your electrical installations. 

Browse our selection of MCBs to find the perfect solution for your needs!

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