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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 £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
    In 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
    £0.73 - £0.73
    Current price £0.73 inc VAT
    £0.61 ex VAT
    Save 86% Save %
  • 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 230/400 V 10kA, 1-Pole, A, 16A, D=70 Mm

    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
    Sold out
  • Original price £1.65 - Original price £1.65
    Original price
    £1.65 inc VAT
    £1.65 - £1.65
    Current price £1.65 inc VAT
    £1.38 ex VAT

    Legrand 402272 16A SP Type B 6KA MCB

    Legrand
    Low stock

    Original price £1.65 - Original price £1.65
    Original price
    £1.65 inc VAT
    £1.65 - £1.65
    Current price £1.65 inc VAT
    £1.38 ex VAT
  • 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, ...

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    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 £5.62 - Original price £5.62
    Original price
    £5.62 inc VAT
    £5.62 - £5.62
    Current price £5.62 inc VAT
    £4.68 ex VAT

    ABB S201P-B16 MCB 1 Pole B Curve 16A 25kA (2CDS281001R0165)

    ABB
    Out of stock

    System pro M compact S200P miniature circuit breakers are current limiting. They have two different tripping mechanisms, the delayed thermal trippi...

    View full details
    Original price £5.62 - Original price £5.62
    Original price
    £5.62 inc VAT
    £5.62 - £5.62
    Current price £5.62 inc VAT
    £4.68 ex VAT
    Sold out
  • Original price £67.85
    Original price £67.85 - Original price £67.85
    Original price £67.85
    Current price £23.75 inc VAT
    £23.75 - £23.75
    Current price £23.75 inc VAT
    £19.79 ex VAT

    Schneider A9F43316 Acti9 MCB iC60N 3 Pole 16A B Curve

    Schneider
    Low stock

    ACTI9 IC60N 3P 16A B 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 £67.85
    Original price £67.85 - Original price £67.85
    Original price £67.85
    Current price £23.75 inc VAT
    £23.75 - £23.75
    Current price £23.75 inc VAT
    £19.79 ex VAT
    Save 65% Save %
  • Original price £6.86
    Original price £6.86 - Original price £6.86
    Original price £6.86
    Current price £5.35 inc VAT
    £5.35 - £5.35
    Current price £5.35 inc VAT
    £4.46 ex VAT

    Crabtree 70B/16 MCB B16 16kA 1P Type B 16A (1 Module Width)

    Crabtree
    Out of stock

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

    View full details
    Original price £6.86
    Original price £6.86 - Original price £6.86
    Original price £6.86
    Current price £5.35 inc VAT
    £5.35 - £5.35
    Current price £5.35 inc VAT
    £4.46 ex VAT
    Sold out
  • 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 £0.00 - Original price £0.00
    Original price £0.00
    £19.95 inc VAT
    £19.95 - £19.95
    Current price £19.95 inc VAT
    £16.63 ex VAT

    Siemens 5SY6216-7 MCB DP C Trip 16A 6Ka

    Siemens
    Out of stock

    Siemens miniature circuit breaker is used to protect systems and installations in buildings and for industrial applications. The devices are approv...

    View full details
    Original price £0.00 - Original price £0.00
    Original price £0.00
    £19.95 inc VAT
    £19.95 - £19.95
    Current price £19.95 inc VAT
    £16.63 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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