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
HK$38.07
Each
units
6 A 1 Type B EZ9 Easy 9 - MCB DIN Rail Mount 72mm - - 18mm 230V Thermal-Magnetic
RS Stock No. 850-8593
Mfr. Part No.EZ9F16110
HK$38.07
Each
units
10 A 1 Type B EZ9 Easy 9 - - - - - - - - -
RS Stock No. 419-583
Mfr. Part No.5906S
HK$63.44
Each
units
6 A 1 Type B 5906S, EMBH, EUB, S800 Sentry - - - - - - - - -
RS Stock No. 850-8596
Mfr. Part No.EZ9F16103
HK$40.21
Each
units
3 A 1 Type B EZ9 Easy 9 - - - - - - - - -
RS Stock No. 850-8628
Mfr. Part No.EZ9F66110
HK$40.08
Each
units
10 A 1 Type C EZ9 Easy 9 - - - - - - - - -
RS Stock No. 381-5782
Mfr. Part No.8706S
HK$49.58
Each
units
6 A 1 Type C 8706S Sentry - - - - - - - - -
RS Stock No. 419-606
Mfr. Part No.5916S
HK$63.44
Each
units
16 A 1 Type B 5916S, EMBH, EUB, S800 Sentry - - - - - - - - -
RS Stock No. 293-1417
Mfr. Part No.0 058 11
BrandLegrand
HK$75.83
Each
units
16 A 1 - - - - - - - - - - - -
RS Stock No. 714-2126
Mfr. Part No.RSNHXB32
BrandWylex
HK$53.13
Each
units
32 A 1 Type B Series 1 NSB 6 kA - DIN Rail Mount 76mm 90 x 18 x 76mm 90mm 18mm - -
RS Stock No. 419-577
Mfr. Part No.5903S
HK$63.44
Each
units
3 A 1 Type B 5903S, EMBH, S800, Series 1 Sentry - - - - - - - - -
RS Stock No. 850-8638
Mfr. Part No.EZ9F66140
HK$36.96
Each
units
40 A 1 Type C EZ9 Easy 9 - - - - - - - - -
RS Stock No. 199-2972
Mfr. Part No.RS/B32
BrandWylex
HK$156.50
Each
units
32 A 1 Type B B Series Plug In - - - - - - - - -
RS Stock No. 714-2110
Mfr. Part No.RSNHXB06
BrandWylex
HK$59.37
Each
units
6 A 1 Type B Series 1 NSB 6 kA - DIN Rail Mount 76mm 90 x 18 x 76mm 90mm 18mm - -
RS Stock No. 850-8625
Mfr. Part No.EZ9F66106
HK$36.96
Each
units
6 A 1 Type C EZ9 Easy 9 - - - - - - - - -
RS Stock No. 850-8634
Mfr. Part No.EZ9F66132
HK$39.63
Each
units
32 A 1 Type C EZ9 Easy 9 - - - - - - - - -
RS Stock No. 419-634
Mfr. Part No.5940S
HK$63.44
Each
units
40 A 1 Type B 5940S, EMCH, EUB, S800 Sentry - - - - - - - - -
RS Stock No. 850-8612
Mfr. Part No.EZ9F16140
HK$36.96
Each
units
40 A 1 Type B EZ9 Easy 9 - - - - - - - - -
RS Stock No. 191-7202
Mfr. Part No.ALB061
BrandEaton
HK$106.34
Each
units
6 A 1 Type B ALB Memera - - - - - - - - -
RS Stock No. 850-8631
Mfr. Part No.EZ9F66120
HK$39.63
Each
units
20 A 1 Type C EZ9 Easy 9 - - - - - - - - -
RS Stock No. 293-1401
Mfr. Part No.0 058 10
BrandLegrand
HK$79.32
Each
units
10 A 1 - - - - - - - - - - - -