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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...

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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
    Save 86% Save %
  • 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
    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 £5.99
    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
    Save 88% Save %
  • 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...

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    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
    Sold out
  • Original price £28.25 - Original price £28.25
    Original price
    £28.25 inc VAT
    £28.25 - £28.25
    Current price £28.25 inc VAT
    £23.54 ex VAT

    ABB 2CDS283001R0324 MCB 3 Pole C Curve 32A 15KA

    ABB
    In 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 £28.25 - Original price £28.25
    Original price
    £28.25 inc VAT
    £28.25 - £28.25
    Current price £28.25 inc VAT
    £23.54 ex VAT
  • Original price £0.00 - Original price £0.00
    Original price £0.00
    £18.88 inc VAT
    £18.88 - £18.88
    Current price £18.88 inc VAT
    £15.73 ex VAT

    ABB MCB Triple Pole Compact Type C 10A 6Ka 2CDS253001R0104

    ABB
    Low stock

    ABB 2CDS253001R0104 3 Pole 10A Type C MCB with Failsafe bi-directional cylinder-lift screw terminal. This System pro M compact S203-C10 MCB is curr...

    View full details
    Original price £0.00 - Original price £0.00
    Original price £0.00
    £18.88 inc VAT
    £18.88 - £18.88
    Current price £18.88 inc VAT
    £15.73 ex VAT
  • Original price £83.28
    Original price £83.28 - Original price £83.28
    Original price £83.28
    Current price £18.10 inc VAT
    £18.10 - £18.10
    Current price £18.10 inc VAT
    £15.08 ex VAT

    ABB 2CCS882001R0801 MCB Double Pole Type D 80A S802C-D80

    ABB
    In stock

    The S802C-D80 is a 2-pole High Performance Circuit breaker with D-Characteristic, with cage terminal and a rated current of 80 A. It is a current l...

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    Original price £83.28
    Original price £83.28 - Original price £83.28
    Original price £83.28
    Current price £18.10 inc VAT
    £18.10 - £18.10
    Current price £18.10 inc VAT
    £15.08 ex VAT
    Save 78% Save %
  • 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 £25.99
    Original price £25.99 - Original price £25.99
    Original price £25.99
    Current price £5.68 inc VAT
    £5.68 - £5.68
    Current price £5.68 inc VAT
    £4.73 ex VAT

    ABB S203P-C20 MCB 3 Pole C Curve 20A 25kA (2CDS283001R0204)

    ABB
    In stock

    ABB 2CDS283001R0204 3 Pole 20A Type C MCB with Failsafe bi-directional cylinder-lift screw terminal. This System pro M compact S203P-C20 MCB is cur...

    View full details
    Original price £25.99
    Original price £25.99 - Original price £25.99
    Original price £25.99
    Current price £5.68 inc VAT
    £5.68 - £5.68
    Current price £5.68 inc VAT
    £4.73 ex VAT
    Save 78% Save %
  • Original price £28.73 - Original price £28.73
    Original price
    £28.73 inc VAT
    £28.73 - £28.73
    Current price £28.73 inc VAT
    £23.94 ex VAT

    ABB S202M-C40 MCB 2 Pole Type C 40A 2CDS272001R0404

    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 £28.73 - Original price £28.73
    Original price
    £28.73 inc VAT
    £28.73 - £28.73
    Current price £28.73 inc VAT
    £23.94 ex VAT
    Sold out
  • Original price £5.04 - Original price £5.04
    Original price
    £5.04 inc VAT
    £5.04 - £5.04
    Current price £5.04 inc VAT
    £4.20 ex VAT

    ABB S201-B50 MCB 1 Pole Type B 50A (2CDS251001R0505)

    ABB
    In stock

    ABB 2CDS251001R0505 1 Pole 50A Type B MCB with Failsafe bi-directional cylinder-lift screw terminal. This System pro M compact S201-B50 MCB is curr...

    View full details
    Original price £5.04 - Original price £5.04
    Original price
    £5.04 inc VAT
    £5.04 - £5.04
    Current price £5.04 inc VAT
    £4.20 ex VAT
  • Original price £0.00 - Original price £0.00
    Original price £0.00
    £6.42 inc VAT
    £6.42 - £6.42
    Current price £6.42 inc VAT
    £5.35 ex VAT

    ABB S201M-C50 MCB 1 Pole Type C 50A (2CDS271001R0504)

    ABB
    Out of stock

    ABB 2CDS271001R0504 1 Pole 50A Type C MCB with Failsafe bi-directional cylinder-lift screw terminal. This System pro M compact S201M-C50 MCB is cur...

    View full details
    Original price £0.00 - Original price £0.00
    Original price £0.00
    £6.42 inc VAT
    £6.42 - £6.42
    Current price £6.42 inc VAT
    £5.35 ex VAT
    Sold out
  • Original price £0.00 - Original price £0.00
    Original price £0.00
    £26.42 inc VAT
    £26.42 - £26.42
    Current price £26.42 inc VAT
    £22.02 ex VAT

    ABB S203M-D50 MCB 3 Pole Type D 50A 2CDS273001R0501

    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 £0.00 - Original price £0.00
    Original price £0.00
    £26.42 inc VAT
    £26.42 - £26.42
    Current price £26.42 inc VAT
    £22.02 ex VAT
  • Original price £6.19
    Original price £6.19 - Original price £6.19
    Original price £6.19
    Current price £1.95 inc VAT
    £1.95 - £1.95
    Current price £1.95 inc VAT
    £1.63 ex VAT

    ABB S201M-D50 Miniature Circuit Breaker - 1P - Type D - 50A 10KA 2CDS271001R0501

    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 £6.19
    Original price £6.19 - Original price £6.19
    Original price £6.19
    Current price £1.95 inc VAT
    £1.95 - £1.95
    Current price £1.95 inc VAT
    £1.63 ex VAT
    Save 68% Save %
  • Original price £0.00 - Original price £0.00
    Original price £0.00
    £34.19 inc VAT
    £34.19 - £34.19
    Current price £34.19 inc VAT
    £28.49 ex VAT

    ABB S203M-D40 Miniature Circuit Breaker Triple Pole Type D 40A 10KA 2CDS273001R0401

    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 £0.00 - Original price £0.00
    Original price £0.00
    £34.19 inc VAT
    £34.19 - £34.19
    Current price £34.19 inc VAT
    £28.49 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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