Residential MCBs

Residential MCBs (miniature circuit breakers) are used in domestic consumer units and switch fuses to break the circuit in case of a fault. They are usually used to protect small appliances or control circuits, and have a fixed trip setting.

How do residential MCBs work?

Residential MCBs are a very low voltage type of circuit breaker. When a current or voltage is interrupted, an arc is generated, which must be controlled and extinguished so that the circuit can function again.

MCBs utilise air alone to break the arc by dividing it into smaller arcs using a series of insulated parallel metal plates known as arc chutes to cool each section down separately. Once the fault is fixed, the contacts are closed once more to restore power to the circuit.

Types of residential MCBs

Residential MCBs can have differing current and voltage ratings, lead times and numbers of poles. Their dimensions can also vary, though all are relatively small.


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Description Price Current Rating Tripping Characteristics Series Range Circuit Breaker Type Mounting Style Overall Depth Overall Width Rated AC Voltage Tripping Mechanism Number of Poles
RS Stock No. 850-8631
Mfr. Part No.EZ9F66120
TWD173.00
Each
units
20 A Type C EZ9 Easy 9 - - - - - - 1
RS Stock No. 850-8622
Mfr. Part No.EZ9F66116
TWD173.00
Each
units
16 A Type C EZ9 Easy 9 - - - - - - 1
RS Stock No. 850-8606
Mfr. Part No.EZ9F16120
TWD173.00
Each
units
20 A Type B EZ9 Easy 9 - - - - - - 1
RS Stock No. 850-8593
Mfr. Part No.EZ9F16110
TWD173.00
Each
units
10 A Type B EZ9 Easy 9 - - - - - - 1
RS Stock No. 850-8619
Mfr. Part No.EZ9F16132
TWD168.00
Each
units
32 A Type B EZ9 Easy 9 - - - - - - 1
RS Stock No. 850-8596
Mfr. Part No.EZ9F16103
TWD173.00
Each
units
3 A Type B EZ9 Easy 9 - - - - - - 1
RS Stock No. 850-8625
Mfr. Part No.EZ9F66106
TWD173.00
Each
units
6 A Type C EZ9 Easy 9 - - - - - - 1
RS Stock No. 850-8600
Mfr. Part No.EZ9F16125
TWD173.00
Each
units
25 A Type B EZ9 Easy 9 - - - - - - 1
RS Stock No. 850-8616
Mfr. Part No.EZ9F16150
TWD173.00
Each
units
50 A Type B EZ9 Easy 9 - - - - - - 1
RS Stock No. 850-8612
Mfr. Part No.EZ9F16140
TWD173.00
Each
units
40 A Type B EZ9 Easy 9 - - - - - - 1
RS Stock No. 850-8599
Mfr. Part No.EZ9F16106
TWD168.00
Each
units
6 A Type B EZ9 Easy 9 MCB DIN Rail Mount 72mm 18mm 230V Thermal-Magnetic 1
RS Stock No. 850-8634
Mfr. Part No.EZ9F66132
TWD173.00
Each
units
32 A Type C EZ9 Easy 9 - - - - - - 1
RS Stock No. 850-8647
Mfr. Part No.EZ9F66150
TWD173.00
Each
units
50 A Type C EZ9 Easy 9 - - - - - - 1
RS Stock No. 293-1423
Mfr. Part No.0 058 12
BrandLegrand
TWD375.00
Each
units
20 A - - - - - - - - - 1
RS Stock No. 850-8628
Mfr. Part No.EZ9F66110
TWD173.00
Each
units
10 A Type C EZ9 Easy 9 - - - - - - 1
RS Stock No. 850-8638
Mfr. Part No.EZ9F66140
TWD173.00
Each
units
40 A Type C EZ9 Easy 9 - - - - - - 1