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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 £2.10
    Original price £2.10 - Original price £2.10
    Original price £2.10
    £0.42 - £2.10
    £0.42 - £2.10
    Current price £0.42 inc VAT
    £1.75 ex VAT

    Essentials B Curve MCB Single Pole 6KA

    Essentials
    Out of stock

    Designed to be used in our Essentials consumer units, they are din rail mounted, designed to take a cable size from 1mm to 16mm and have a toggle w...

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    Original price £2.10
    Original price £2.10 - Original price £2.10
    Original price £2.10
    £0.42 - £2.10
    £0.42 - £2.10
    Current price £0.42 inc VAT
    £1.75 ex VAT
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  • Original price £5.18
    Original price £5.18 - Original price £5.18
    Original price £5.18
    Current price £0.73 inc VAT
    £0.73 - £0.73
    Current price £0.73 inc VAT
    £0.61 ex VAT

    ABB MCB S201MD16 Single Pole Type D 16A 10Ka

    ABB
    Out of stock

    System Pro M Compact S200M Miniature Circuit Breakers Are Current Limiting. They Have Two Different Tripping Mechanisms, The Delayed Thermal Trippi...

    View full details
    Original price £5.18
    Original price £5.18 - Original price £5.18
    Original price £5.18
    Current price £0.73 inc VAT
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    Current price £0.73 inc VAT
    £0.61 ex VAT
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  • Original price £5.99
    Original price £5.99 - Original price £5.99
    Original price £5.99
    Current price £0.69 inc VAT
    £0.69 - £0.69
    Current price £0.69 inc VAT
    £0.58 ex VAT

    ABB MCB S201Md63 Single Pole Type D 63A 10Ka 2CDS271001R0631

    ABB
    Out of stock

    System Pro M Compact S200M Miniature Circuit Breakers Are Current Limiting. They Have Two Different Tripping Mechanisms, The Delayed Thermal Trippi...

    View full details
    Original price £5.99
    Original price £5.99 - Original price £5.99
    Original price £5.99
    Current price £0.69 inc VAT
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    Current price £0.69 inc VAT
    £0.58 ex VAT
    Sold out
  • Original price £7.79
    Original price £7.79 - Original price £7.79
    Original price £7.79
    Current price £1.69 inc VAT
    £1.69 - £1.69
    Current price £1.69 inc VAT
    £1.41 ex VAT

    ABB MCB 1 Pole C Curve 6A 25Ka 2CDS281001R0064

    ABB
    Out of stock

    ABB 2CDS281001R0064 1 Pole 6A Type C MCB with Failsafe bi-directional cylinder-lift screw terminal. This System pro M compact S201P-C6 MCB is curre...

    View full details
    Original price £7.79
    Original price £7.79 - Original price £7.79
    Original price £7.79
    Current price £1.69 inc VAT
    £1.69 - £1.69
    Current price £1.69 inc VAT
    £1.41 ex VAT
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  • Original price £20.77
    Original price £20.77 - Original price £20.77
    Original price £20.77
    Current price £6.77 inc VAT
    £6.77 - £6.77
    Current price £6.77 inc VAT
    £5.64 ex VAT

    Dorman Smith K2PC06 MCB K Series Type C DP 6A 10Ka

    Dorman Smith
    Out of stock

    Double Pole MCB

    Original price £20.77
    Original price £20.77 - Original price £20.77
    Original price £20.77
    Current price £6.77 inc VAT
    £6.77 - £6.77
    Current price £6.77 inc VAT
    £5.64 ex VAT
    Sold out
  • Original price £2.35
    Original price £2.35 - Original price £2.35
    Original price £2.35
    Current price £0.49 inc VAT
    £0.49 - £0.49
    Current price £0.49 inc VAT
    £0.41 ex VAT

    Legrand 419758 63A SP Type B 6Ka MCB

    Legrand
    Out of stock

    Breaking Capacity: 6000A • Current Rating: 63A • Number of Poles: 1 Pole • Range: Rx3

    Original price £2.35
    Original price £2.35 - Original price £2.35
    Original price £2.35
    Current price £0.49 inc VAT
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    Current price £0.49 inc VAT
    £0.41 ex VAT
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  • Original price £48.30
    Original price £48.30 - Original price £48.30
    Original price £48.30
    Current price £8.05 inc VAT
    £8.05 - £8.05
    Current price £8.05 inc VAT
    £6.71 ex VAT

    Schneider A9F45210 Acti9 iC60N 2p 10A D MCB Miniature Circuit Breaker

    Schneider Electric
    Out of stock

    ACTI9 IC60N 2P 10A D MCB • This Acti9 iC60N is a low voltage miniature circuit breaker (MCB). • It is a 2P circuit breaker with 2 protected poles...

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    Original price £48.30
    Original price £48.30 - Original price £48.30
    Original price £48.30
    Current price £8.05 inc VAT
    £8.05 - £8.05
    Current price £8.05 inc VAT
    £6.71 ex VAT
    Sold out
  • Original price £11.48
    Original price £11.48 - Original price £11.48
    Original price £11.48
    Current price £2.76 inc VAT
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    Current price £2.76 inc VAT
    £2.30 ex VAT

    Schneider C60HC120 Multi 9 Miniature Circuit Breaker 1-Pole 20A Curve C 15kA

    Schneider
    Out of stock

    Original price £11.48
    Original price £11.48 - Original price £11.48
    Original price £11.48
    Current price £2.76 inc VAT
    £2.76 - £2.76
    Current price £2.76 inc VAT
    £2.30 ex VAT
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  • Original price £14.39
    Original price £14.39 - Original price £14.39
    Original price £14.39
    Current price £2.90 inc VAT
    £2.90 - £2.90
    Current price £2.90 inc VAT
    £2.42 ex VAT

    Siemens 5SY4116-5 Miniature Circuit Breaker 230/400V 10kA 1-Pole A 16A D=70mm

    Siemens
    Out of stock

    Miniature circuit breaker 230/400 V 10kA, 1-pole, A, 16A, D=70 mm The miniature circuit breaker is the fuse for short-circuit protection. The minia...

    View full details
    Original price £14.39
    Original price £14.39 - Original price £14.39
    Original price £14.39
    Current price £2.90 inc VAT
    £2.90 - £2.90
    Current price £2.90 inc VAT
    £2.42 ex VAT
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  • Original price £10.92
    Original price £10.92 - Original price £10.92
    Original price £10.92
    Current price £2.42 inc VAT
    £2.42 - £2.42
    Current price £2.42 inc VAT
    £2.02 ex VAT

    Wylex NSB310-C MCB TP Type C 10A 6kA

    Wylex
    Out of stock

    Original price £10.92
    Original price £10.92 - Original price £10.92
    Original price £10.92
    Current price £2.42 inc VAT
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    Current price £2.42 inc VAT
    £2.02 ex VAT
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  • Original price £20.17
    Original price £20.17 - Original price £20.17
    Original price £20.17
    Current price £4.25 inc VAT
    £4.25 - £4.25
    Current price £4.25 inc VAT
    £3.54 ex VAT

    Schneider A9N21554 Clario iDPN 1-Pole 3A 6/10kA Curve-C Miniature Circuit Breaker 18 x 81 x 78mm

    Schneider Electric
    Out of stock

    This Clario iDPN N product is a low voltage miniature circuit breaker (MCB). It is a 1P+N circuit breaker with 1 protected pole and 3A In rated cur...

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    Original price £20.17
    Original price £20.17 - Original price £20.17
    Original price £20.17
    Current price £4.25 inc VAT
    £4.25 - £4.25
    Current price £4.25 inc VAT
    £3.54 ex VAT
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  • Original price £8.93
    Original price £8.93 - Original price £8.93
    Original price £8.93
    Current price £1.05 inc VAT
    £1.05 - £1.05
    Current price £1.05 inc VAT
    £0.88 ex VAT

    Schneider C60HB110 MCB C60H SP Type B 10A 15KA

    Schneider Electric
    Out of stock

    Original price £8.93
    Original price £8.93 - Original price £8.93
    Original price £8.93
    Current price £1.05 inc VAT
    £1.05 - £1.05
    Current price £1.05 inc VAT
    £0.88 ex VAT
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  • Original price £10.56
    Original price £10.56 - Original price £10.56
    Original price £10.56
    Current price £3.44 inc VAT
    £3.44 - £3.44
    Current price £3.44 inc VAT
    £2.87 ex VAT

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

    Siemens
    Out of stock

    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...

    View full details
    Original price £10.56
    Original price £10.56 - Original price £10.56
    Original price £10.56
    Current price £3.44 inc VAT
    £3.44 - £3.44
    Current price £3.44 inc VAT
    £2.87 ex VAT
    Sold out
  • Original price £161.06
    Original price £161.06 - Original price £161.06
    Original price £161.06
    Current price £26.54 inc VAT
    £26.54 - £26.54
    Current price £26.54 inc VAT
    £22.12 ex VAT

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

    Schneider Electric
    Out of stock

    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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    Original price £161.06
    Original price £161.06 - Original price £161.06
    Original price £161.06
    Current price £26.54 inc VAT
    £26.54 - £26.54
    Current price £26.54 inc VAT
    £22.12 ex VAT
    Sold out
  • Original price £43.87
    Original price £43.87 - Original price £43.87
    Original price £43.87
    Current price £7.26 inc VAT
    £7.26 - £7.26
    Current price £7.26 inc VAT
    £6.05 ex VAT

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

    Schneider Electric
    Out of stock

    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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    Original price £43.87
    Original price £43.87 - Original price £43.87
    Original price £43.87
    Current price £7.26 inc VAT
    £7.26 - £7.26
    Current price £7.26 inc VAT
    £6.05 ex VAT
    Sold out
  • Original price £6.86
    Original price £6.86 - Original price £6.86
    Original price £6.86
    Current price £2.72 inc VAT
    £2.72 - £2.72
    Current price £2.72 inc VAT
    £2.27 ex VAT

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

    Crabtree
    Out of stock

    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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    Original price £6.86
    Original price £6.86 - Original price £6.86
    Original price £6.86
    Current price £2.72 inc VAT
    £2.72 - £2.72
    Current price £2.72 inc VAT
    £2.27 ex VAT
    Sold out
  • 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...

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    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) Single Pole Type B 10A Grey

    Eaton
    Out of stock

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

    View full details
    Original price £2.60
    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
    Sold out
  • Original price £22.01
    Original price £22.01 - Original price £22.01
    Original price £22.01
    Current price £10.23 inc VAT
    £10.23 - £10.23
    Current price £10.23 inc VAT
    £8.53 ex VAT

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

    Hager
    Out of stock

    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...

    View full details
    Original price £22.01
    Original price £22.01 - Original price £22.01
    Original price £22.01
    Current price £10.23 inc VAT
    £10.23 - £10.23
    Current price £10.23 inc VAT
    £8.53 ex VAT
    Sold out
  • Original price £1.54 - Original price £1.54
    Original price
    £1.54 inc VAT
    £1.54 - £1.54
    Current price £1.54 inc VAT
    £1.28 ex VAT

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

    MK Electric
    Out of stock

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

    View full details
    Original price £1.54 - Original price £1.54
    Original price
    £1.54 inc VAT
    £1.54 - £1.54
    Current price £1.54 inc VAT
    £1.28 ex VAT
    Sold out
  • Original price £62.31
    Original price £62.31 - Original price £62.31
    Original price £62.31
    Current price £22.48 inc VAT
    £22.48 - £22.48
    Current price £22.48 inc VAT
    £18.73 ex VAT

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

    Schneider Electric
    Out of stock

    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
    Original price £62.31
    Original price £62.31 - Original price £62.31
    Original price £62.31
    Current price £22.48 inc VAT
    £22.48 - £22.48
    Current price £22.48 inc VAT
    £18.73 ex VAT
    Sold out
  • Original price £4.16 - Original price £4.16
    Original price
    £4.16 inc VAT
    £4.16 - £4.16
    Current price £4.16 inc VAT
    £3.47 ex VAT

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

    Volex
    Out of stock

    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
    Original price £4.16 - Original price £4.16
    Original price
    £4.16 inc VAT
    £4.16 - £4.16
    Current price £4.16 inc VAT
    £3.47 ex VAT
    Sold out
  • Original price £5.64 - Original price £5.64
    Original price
    £5.64 inc VAT
    £5.64 - £5.64
    Current price £5.64 inc VAT
    £4.70 ex VAT

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

    Volex
    Out of stock

    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
    Original price £5.64 - Original price £5.64
    Original price
    £5.64 inc VAT
    £5.64 - £5.64
    Current price £5.64 inc VAT
    £4.70 ex VAT
    Sold out
  • Original price £28.25
    Original price £28.25 - Original price £28.25
    Original price £28.25
    Current price £11.43 inc VAT
    £11.43 - £11.43
    Current price £11.43 inc VAT
    £9.53 ex VAT

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

    Crabtree
    Out of stock

    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

    Original price £28.25
    Original price £28.25 - Original price £28.25
    Original price £28.25
    Current price £11.43 inc VAT
    £11.43 - £11.43
    Current price £11.43 inc VAT
    £9.53 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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