Skip to content
Orders received over Christmas/New Year will be delivered from 3rd Jan 2025. Click for details >>
Orders received over Christmas/New Year will be delivered from 3rd Jan 2025. Click for details >>

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 £24.23
    Original price £24.23 - Original price £24.23
    Original price £24.23
    Current price £3.08 inc VAT
    £3.08 - £3.08
    Current price £3.08 inc VAT
    £2.57 ex VAT

    Wylex NB06 MCB SP 6A 3Ka

    Wylex
    In stock

    Wylex NB06 MCB SP 6A 3kA • Rated at 6kA

    Original price £24.23
    Original price £24.23 - Original price £24.23
    Original price £24.23
    Current price £3.08 inc VAT
    £3.08 - £3.08
    Current price £3.08 inc VAT
    £2.57 ex VAT
    Save 87% 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...

    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
    Sold out
  • 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 £2.33 - Original price £2.33
    Original price
    £2.33 inc VAT
    £2.33 - £2.33
    Current price £2.33 inc VAT
    £1.94 ex VAT

    Legrand 419749 MCB Rx3 Single Pole Type B 6A 6Ka 1 Module

    Legrand
    In stock

    Breaking Capacity: 6000A • Current Rating: 6A • Number of Poles: 1 Pole • Range: Rx3

    Original price £2.33 - Original price £2.33
    Original price
    £2.33 inc VAT
    £2.33 - £2.33
    Current price £2.33 inc VAT
    £1.94 ex VAT
  • Original price £15.54
    Original price £15.54 - Original price £15.54
    Original price £15.54
    Current price £2.23 inc VAT
    £2.23 - £2.23
    Current price £2.23 inc VAT
    £1.86 ex VAT

    Legrand IAB410A Module Protection 6A MCB 16A

    Legrand
    In stock

    Original price £15.54
    Original price £15.54 - Original price £15.54
    Original price £15.54
    Current price £2.23 inc VAT
    £2.23 - £2.23
    Current price £2.23 inc VAT
    £1.86 ex VAT
    Save 86% Save %
  • 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 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...

    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 £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
    In 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
  • 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 £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...

    View full details
    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 £19.16 - Original price £19.16
    Original price
    £19.16 inc VAT
    £19.16 - £19.16
    Current price £19.16 inc VAT
    £15.97 ex VAT

    Wylex NSB06 MCB SP Type B 6A 6Ka 1 Module

    Wylex
    Out of stock

    Wylex NS Miniature Circuit Breaker is the thermal-magnetic current limiting type, having a compact construction which has been achieved by not only...

    View full details
    Original price £19.16 - Original price £19.16
    Original price
    £19.16 inc VAT
    £19.16 - £19.16
    Current price £19.16 inc VAT
    £15.97 ex VAT
    Sold out
  • Original price £3.68
    Original price £3.68 - Original price £3.68
    Original price £3.68
    Current price £0.78 inc VAT
    £0.78 - £0.78
    Current price £0.78 inc VAT
    £0.65 ex VAT

    Crabtree 6HS06D MCB D6 10kA 1P Type D 6A (1 Module Width)

    Crabtree
    In stock

    This Miniature Circuit Breaker, is a thermal-magnetic current limiting type, having a compact construction which has been achieved by not only mini...

    View full details
    Original price £3.68
    Original price £3.68 - Original price £3.68
    Original price £3.68
    Current price £0.78 inc VAT
    £0.78 - £0.78
    Current price £0.78 inc VAT
    £0.65 ex VAT
    Save 79% Save %
  • Original price £4.86 - Original price £4.86
    Original price
    £4.86 inc VAT
    £4.86 - £4.86
    Current price £4.86 inc VAT
    £4.05 ex VAT

    Dorman Smith X1PB06 MCB SP 6A Type B

    Dorman Smith
    Out of stock

    Conforms to EN 60898 • 10kA rated breaking capacity • Contact position indicator • 35mm2 cable capacity

    Original price £4.86 - Original price £4.86
    Original price
    £4.86 inc VAT
    £4.86 - £4.86
    Current price £4.86 inc VAT
    £4.05 ex VAT
    Sold out
  • 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...

    View full details
    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 £27.24
    Original price £27.24 - Original price £27.24
    Original price £27.24
    Current price £5.49 inc VAT
    £5.49 - £5.49
    Current price £5.49 inc VAT
    £4.58 ex VAT

    Siemens 5SY4206-8 MCB DP Type D 6A 10Ka

    Siemens
    In 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 £27.24
    Original price £27.24 - Original price £27.24
    Original price £27.24
    Current price £5.49 inc VAT
    £5.49 - £5.49
    Current price £5.49 inc VAT
    £4.58 ex VAT
    Save 80% Save %

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!

Free Shipping

When you spend £50

1000s products in stock

Order by 2pm for next working day delivery*

Secure Payment

Google Pay, Apple Pay, Paypal

Great Deals

Special Offers