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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!

  • Original price £4.74 - Original price £4.74
    Original price
    £4.74 inc VAT
    £4.74 - £4.74
    Current price £4.74 inc VAT
    £3.95 ex VAT

    Eaton AD32B 32A SP MCB Type B 6Ka

    Eaton
    In stock

    Eaton Memera AD32B Miniature Circuit Breaker is a consumer unit device suitable for circuit protection. It complies to BSEN 60898 • To BSEN 60898 ...

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    Original price £4.74 - Original price £4.74
    Original price
    £4.74 inc VAT
    £4.74 - £4.74
    Current price £4.74 inc VAT
    £3.95 ex VAT
  • Original price £33.60 - Original price £33.60
    Original price
    £33.60 inc VAT
    £33.60 - £33.60
    Current price £33.60 inc VAT
    £28.00 ex VAT

    Eaton MCB DP Type D 20A 10/15Ka

    Eaton
    In stock

    EM miniature circuit-breaker, 2 pole, trip type: D, rated operational current In: 20 A, rated switching capacity according to IEC/EN 60947-2: 15 kA...

    View full details
    Original price £33.60 - Original price £33.60
    Original price
    £33.60 inc VAT
    £33.60 - £33.60
    Current price £33.60 inc VAT
    £28.00 ex VAT
  • Original price £51.56
    Original price £51.56 - Original price £51.56
    Original price £51.56
    Current price £10.48 inc VAT
    £10.48 - £10.48
    Current price £10.48 inc VAT
    £8.73 ex VAT

    Eaton 101QB MCB SP Type 1 10A

    Eaton
    Low stock

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

    Original price £51.56
    Original price £51.56 - Original price £51.56
    Original price £51.56
    Current price £10.48 inc VAT
    £10.48 - £10.48
    Current price £10.48 inc VAT
    £8.73 ex VAT
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  • Original price £2.02 - Original price £2.02
    Original price
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    £2.02 - £2.02
    Current price £2.02 inc VAT
    £1.68 ex VAT

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

    Eaton
    In stock

    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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    Original price £2.02 - Original price £2.02
    Original price
    £2.02 inc VAT
    £2.02 - £2.02
    Current price £2.02 inc VAT
    £1.68 ex VAT
  • Original price £2.50 - Original price £2.50
    Original price
    £2.50 inc VAT
    £2.50 - £2.50
    Current price £2.50 inc VAT
    £2.08 ex VAT

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

    Eaton
    Out of stock

    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...

    View full details
    Original price £2.50 - Original price £2.50
    Original price
    £2.50 inc VAT
    £2.50 - £2.50
    Current price £2.50 inc VAT
    £2.08 ex VAT
    Sold out
  • Original price £2.60
    Original price £2.60 - Original price £2.60
    Original price £2.60
    Current price £0.61 inc VAT
    £0.61 - £0.61
    Current price £0.61 inc VAT
    £0.51 ex VAT

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

    Eaton
    In stock

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

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    Original price £2.60
    Original price £2.60 - Original price £2.60
    Original price £2.60
    Current price £0.61 inc VAT
    £0.61 - £0.61
    Current price £0.61 inc VAT
    £0.51 ex VAT
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  • Original price £23.35 - Original price £23.35
    Original price
    £23.35 inc VAT
    £23.35 - £23.35
    Current price £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

    Eaton
    In stock

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

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    Original price £23.35 - Original price £23.35
    Original price
    £23.35 inc VAT
    £23.35 - £23.35
    Current price £23.35 inc VAT
    £19.46 ex VAT
  • Original price £23.35
    Original price £23.35 - Original price £23.35
    Original price £23.35
    Current price £9.99 inc VAT
    £9.99 - £9.99
    Current price £9.99 inc VAT
    £8.33 ex VAT

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

    Eaton
    In stock

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

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    Original price £23.35
    Original price £23.35 - Original price £23.35
    Original price £23.35
    Current price £9.99 inc VAT
    £9.99 - £9.99
    Current price £9.99 inc VAT
    £8.33 ex VAT
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  • Original price £37.86
    Original price £37.86 - Original price £37.86
    Original price £37.86
    Current price £16.73 inc VAT
    £16.73 - £16.73
    Current price £16.73 inc VAT
    £13.94 ex VAT

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

    Eaton
    In stock

    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...

    View full details
    Original price £37.86
    Original price £37.86 - Original price £37.86
    Original price £37.86
    Current price £16.73 inc VAT
    £16.73 - £16.73
    Current price £16.73 inc VAT
    £13.94 ex VAT
    Save 56% Save %
  • Original price £0.00 - Original price £0.00
    Original price £0.00
    £10.39 inc VAT
    £10.39 - £10.39
    Current price £10.39 inc VAT
    £8.66 ex VAT

    Eaton FAZ-D6/1 MCB Y7-278578 SP Type D 6A 10Ka

    Eaton
    In stock

    Miniature circuit breaker (MCB) FAZ, 1 pole, Tripping characteristic: D, Rated current In: 6 A, Switchgear for industrial and advanced commercial a...

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    Original price £0.00 - Original price £0.00
    Original price £0.00
    £10.39 inc VAT
    £10.39 - £10.39
    Current price £10.39 inc VAT
    £8.66 ex VAT
  • Original price £3.81
    Original price £3.81 - Original price £3.81
    Original price £3.81
    Current price £0.77 inc VAT
    £0.77 - £0.77
    Current price £0.77 inc VAT
    £0.64 ex VAT

    Eaton MBH113 MCB SP Type B 13A 10Ka

    Eaton
    In stock

    MBH113 • Complete and configurable enclosures MCBs, MCCBs, ACBs

    Original price £3.81
    Original price £3.81 - Original price £3.81
    Original price £3.81
    Current price £0.77 inc VAT
    £0.77 - £0.77
    Current price £0.77 inc VAT
    £0.64 ex VAT
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  • Original price £2.02 - Original price £2.02
    Original price
    £2.02 inc VAT
    £2.02 - £2.02
    Current price £2.02 inc VAT
    £1.68 ex VAT

    Eaton EAD20B MCB Single Pole Type B 20A Grey

    Eaton
    In stock

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

    View full details
    Original price £2.02 - Original price £2.02
    Original price
    £2.02 inc VAT
    £2.02 - £2.02
    Current price £2.02 inc VAT
    £1.68 ex VAT
  • Original price £10.81
    Original price £10.81 - Original price £10.81
    Original price £10.81
    Current price £2.19 inc VAT
    £2.19 - £2.19
    Current price £2.19 inc VAT
    £1.83 ex VAT

    Eaton PLSM-C6/3-DW MCB PLSM 6A 15kA 3 Pole

    Eaton
    In stock

    Eaton PLSM-C6/3-DW 3 Pole 6A Type C MCB featuring a guide for secure terminal connection, and compatible with standard busbar which can be position...

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    Original price £10.81
    Original price £10.81 - Original price £10.81
    Original price £10.81
    Current price £2.19 inc VAT
    £2.19 - £2.19
    Current price £2.19 inc VAT
    £1.83 ex VAT
    Save 80% Save %
  • Original price £29.06
    Original price £29.06 - Original price £29.06
    Original price £29.06
    Current price £5.90 inc VAT
    £5.90 - £5.90
    Current price £5.90 inc VAT
    £4.92 ex VAT

    Eaton 239097 MCB 2A 2 Pole Type C 6Ka

    Eaton
    In stock

    This is a 2-ampere, 2-pole, C-type miniature circuit breaker (MCB). It has a 230-400V AC voltage rating and a 6kA interrupting rating. Part of Eato...

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    Original price £29.06
    Original price £29.06 - Original price £29.06
    Original price £29.06
    Current price £5.90 inc VAT
    £5.90 - £5.90
    Current price £5.90 inc VAT
    £4.92 ex VAT
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  • Original price £2.11 - Original price £2.11
    Original price
    £2.11 inc VAT
    £2.11 - £2.11
    Current price £2.11 inc VAT
    £1.76 ex VAT

    Eaton EAD40B MCB 1 Pole 40A Type B 6kA 17.5 x 80 x 75mm Grey

    Eaton
    In stock

    Miniature circuit breaker (MCB) • DIN rail mountable and suitable for use with both pin and comb type busbar systems • Toggle position for positive...

    View full details
    Original price £2.11 - Original price £2.11
    Original price
    £2.11 inc VAT
    £2.11 - £2.11
    Current price £2.11 inc VAT
    £1.76 ex VAT
  • Original price £2.31 - Original price £2.31
    Original price
    £2.31 inc VAT
    £2.31 - £2.31
    Current price £2.31 inc VAT
    £1.93 ex VAT

    Eaton EAD16B MCB 1 Pole 16A Type B 6kA 17.5 x 80 x 75mm Grey

    Eaton
    In stock

    Miniature circuit breaker (MCB) • Toggle position for positive contact indication • Selectivity class 3 • Calibration temperature 40°C • Suitable f...

    View full details
    Original price £2.31 - Original price £2.31
    Original price
    £2.31 inc VAT
    £2.31 - £2.31
    Current price £2.31 inc VAT
    £1.93 ex VAT
  • Original price £2.11 - Original price £2.11
    Original price
    £2.11 inc VAT
    £2.11 - £2.11
    Current price £2.11 inc VAT
    £1.76 ex VAT

    Eaton EAD50B MCB 1-Pole 50A Type B 6kA - 17.5 x 80 x 75mm Grey

    Eaton
    In stock

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

    View full details
    Original price £2.11 - Original price £2.11
    Original price
    £2.11 inc VAT
    £2.11 - £2.11
    Current price £2.11 inc VAT
    £1.76 ex VAT
  • Original price £1.73
    Original price £1.73 - Original price £1.73
    Original price £1.73
    Current price £1.04 inc VAT
    £1.04 - £1.04
    Current price £1.04 inc VAT
    £0.87 ex VAT

    Eaton EAD20B MCB 20A Type B Single Pole

    Eaton
    Out of stock

    Original price £1.73
    Original price £1.73 - Original price £1.73
    Original price £1.73
    Current price £1.04 inc VAT
    £1.04 - £1.04
    Current price £1.04 inc VAT
    £0.87 ex VAT
    Sold out

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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