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 Number of Poles Tripping Characteristics Series Range Breaking Capacity at Maximum Voltage Rating Circuit Breaker Type Mounting Style Overall Depth Overall Dimensions Overall Length Overall Width Rated AC Voltage Tripping Mechanism
RS Stock No. 850-8599
Mfr. Part No.EZ9F16106
£3.73
Each
Units
6A 1 Type B EZ9 Easy 9 - MCB DIN Rail Mount 72mm - - 18mm 230V Thermal-Magnetic
RS Stock No. 199-2944
Mfr. Part No.RS/B16
BrandWylex
£10.44
Each
Units
16A 1 Type B B Series Plug In - - - - - - - - -
RS Stock No. 850-8603
Mfr. Part No.EZ9F16116
£3.73
Each
Units
16A 1 Type B EZ9 Easy 9 - - DIN Rail Mount 72mm - - 18mm - Thermal-Magnetic
RS Stock No. 714-2110
Mfr. Part No.RSNHXB06
BrandWylex
£4.98
Each
Units
6A 1 Type B Series 1 NSB 6 kA - DIN Rail Mount 76mm 90 x 18 x 76mm 90mm 18mm - -
RS Stock No. 714-2126
Mfr. Part No.RSNHXB32
BrandWylex
£4.98
Each
Units
32A 1 Type B Series 1 NSB 6 kA - DIN Rail Mount 76mm 90 x 18 x 76mm 90mm 18mm - -
RS Stock No. 199-4029
Mfr. Part No.RS/B6
BrandWylex
£8.71
Each
Units
6A 1 Type B B Series Plug In - - - - - - - - -
RS Stock No. 191-7252
Mfr. Part No.ALB321
BrandEaton
£9.97
Each
Units
32A 1 Type B ALB Memera - - - - - - - - -
RS Stock No. 850-8628
Mfr. Part No.EZ9F66110
£3.85
Each
Units
10A 1 Type C EZ9 Easy 9 - - - - - - - - -
RS Stock No. 714-2123
Mfr. Part No.RSNHXB16
BrandWylex
£4.98
Each
Units
16A 1 Type B Series 1 NSB 6 kA - DIN Rail Mount 76mm 90 x 18 x 76mm 90mm 18mm - -
RS Stock No. 850-8622
Mfr. Part No.EZ9F66116
£3.85
Each
Units
16A 1 Type C EZ9 Easy 9 - - - - - - - - -
RS Stock No. 850-8619
Mfr. Part No.EZ9F16132
£3.73
Each
Units
32A 1 Type B EZ9 Easy 9 - - - - - - - - -
RS Stock No. 199-2972
Mfr. Part No.RS/B32
BrandWylex
£13.95
Each
Units
32A 1 Type B B Series Plug In - - - - - - - - -
RS Stock No. 714-2114
Mfr. Part No.RSNHXB10
BrandWylex
£4.98
Each
Units
10A 1 Type B Series 1 NSB 6 kA - DIN Rail Mount 76mm 90 x 18 x 76mm 90mm 18mm - -
RS Stock No. 850-8596
Mfr. Part No.EZ9F16103
£3.85
Each
Units
3A 1 Type B EZ9 Easy 9 - - - - - - - - -
RS Stock No. 714-2120
Mfr. Part No.RSNHXB40
BrandWylex
£4.96
Each
Units
40A 1 Type B Series 1 NSB 6 kA - DIN Rail Mount 76mm 90 x 18 x 76mm 90mm 18mm - -
RS Stock No. 191-7202
Mfr. Part No.ALB061
BrandEaton
£10.77
Each
Units
6A 1 Type B ALB Memera - - - - - - - - -
RS Stock No. 850-8625
Mfr. Part No.EZ9F66106
£3.85
Each
Units
6A 1 Type C EZ9 Easy 9 - - - - - - - - -
RS Stock No. 419-583
Mfr. Part No.5906S
£5.09
Each
Units
6A 1 Type B 5906S, EMBH, EUB, S800 Sentry - - - - - - - - -
RS Stock No. 191-7230
Mfr. Part No.ALB201
BrandEaton
£9.97
Each
Units
20A 1 Type B ALB Memera - - - - - - - - -
RS Stock No. 191-7268
Mfr. Part No.ALB401
BrandEaton
£11.19
Each
Units
40A 1 Type B ALB Memera - - - - - - - - -
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