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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 £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

    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...

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    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 £11.48 - Original price £11.48
    Original price
    £11.48 inc VAT
    £11.48 - £11.48
    Current price £11.48 inc VAT
    £9.57 ex VAT

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

    Original price £11.48 - Original price £11.48
    Original price
    £11.48 inc VAT
    £11.48 - £11.48
    Current price £11.48 inc VAT
    £9.57 ex VAT
  • Original price £9.61 - Original price £9.61
    Original price
    £9.61 inc VAT
    £9.61 - £9.61
    Current price £9.61 inc VAT
    £8.01 ex VAT

    Schneider C60HD120 MCB SP Type D 20A 15KA

    Original price £9.61 - Original price £9.61
    Original price
    £9.61 inc VAT
    £9.61 - £9.61
    Current price £9.61 inc VAT
    £8.01 ex VAT
  • Original price £25.99 - Original price £25.99
    Original price
    £25.99 inc VAT
    £25.99 - £25.99
    Current price £25.99 inc VAT
    £21.66 ex VAT

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

    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...

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    Original price £25.99 - Original price £25.99
    Original price
    £25.99 inc VAT
    £25.99 - £25.99
    Current price £25.99 inc VAT
    £21.66 ex VAT
  • 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

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

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    Original price £2.02 - 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 £2.71 - Original price £2.71
    Original price
    £2.71 inc VAT
    £2.71 - £2.71
    Current price £2.71 inc VAT
    £2.26 ex VAT

    Protek HDMCB-1B20 MCB Type B SP 1 Module 20A 10KA 18mm

    Original price £2.71 - Original price £2.71
    Original price
    £2.71 inc VAT
    £2.71 - £2.71
    Current price £2.71 inc VAT
    £2.26 ex VAT
  • Original price £24.74 - Original price £24.74
    Original price
    £24.74 inc VAT
    £24.74 - £24.74
    Current price £24.74 inc VAT
    £20.62 ex VAT

    Siemens 5SY4220-8 MCB DP Type D 20A 10Ka

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

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    Original price £24.74 - Original price £24.74
    Original price
    £24.74 inc VAT
    £24.74 - £24.74
    Current price £24.74 inc VAT
    £20.62 ex VAT
  • Original price £27.85 - Original price £27.85
    Original price
    £27.85 inc VAT
    £27.85 - £27.85
    Current price £27.85 inc VAT
    £23.21 ex VAT

    Hager NBN320N MCB 3 Pole 10kA/15kA Type B 20A 3M

    The NBN320N is a 20A, 10kA, triple pole, type B miniature circuit breaker (MCB) from Hager. It is part of the NBN range of MCBs, which are designed...

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    Original price £27.85 - Original price £27.85
    Original price
    £27.85 inc VAT
    £27.85 - £27.85
    Current price £27.85 inc VAT
    £23.21 ex VAT
  • Original price £1.73 - Original price £1.73
    Original price
    £1.73 inc VAT
    £1.73 - £1.73
    Current price £1.73 inc VAT
    £1.44 ex VAT

    Lewden EC-1B20 MCB EC-1 B 20A 6KA

    Miniature Circuit Breakers are for installation into Lewden's range of domestic Amendment 3 consumer units providing protection for cables, lightin...

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    Original price £1.73 - Original price £1.73
    Original price
    £1.73 inc VAT
    £1.73 - £1.73
    Current price £1.73 inc VAT
    £1.44 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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