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. 381-5827
Mfr. Part No.8732S
R 110.11
Each
units
32 A 1 Type C 8732S Sentry - - - - - - - - -
RS stock no. 419-606
Mfr. Part No.5916S
R 110.37
Each
units
16 A 1 Type B 5916S, EMBH, EUB, S800 Sentry - - - - - - - - -
RS stock no. 419-583
Mfr. Part No.5906S
R 120.74
Each
units
6 A 1 Type B 5906S, EMBH, EUB, S800 Sentry - - - - - - - - -
RS stock no. 419-612
Mfr. Part No.5920S
R 110.24
Each
units
20 A 1 Type B 5920S, EMBH, EUB, S800 Sentry - - - - - - - - -
RS stock no. 381-5798
Mfr. Part No.8710S
R 110.11
Each
units
10 A 1 Type C 8710S Sentry - - - - - - - - -
RS stock no. 714-2114
Mfr. Part No.RSNHXB10
BrandWylex
R 101.93
Each
units
10 A 1 Type B Series 1 NSB 6 kA - DIN Rail Mount 76mm 90 x 18 x 76mm 90mm 18mm - -
RS stock no. 798-2211
Mfr. Part No.EUB125B
BrandEuropa
R 58.64
Each
units
25 A 1 Type B EUB EU - - - - - - - 230 V ac, 240 V ac -
RS stock no. 714-2123
Mfr. Part No.RSNHXB16
BrandWylex
R 101.93
Each
units
16 A 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
R 103.19
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. 381-5811
Mfr. Part No.8720S
R 110.11
Each
units
20 A 1 Type C 8720S Sentry - - - - - - - - -
RS stock no. 381-5782
Mfr. Part No.8706S
R 114.02
Each
units
6 A 1 Type C 8706S Sentry - - - - - - - - -
RS stock no. 229-7919
Mfr. Part No.ALB501
BrandEaton
R 221.88
Each
units
50 A 1 Type B ALB Memera - - - - - - - - -
RS stock no. 419-599
Mfr. Part No.5910S
R 109.61
Each
units
10 A 1 Type B 5910S, EMBH, EUB, S800 Sentry - - - - - - - - -
RS stock no. 798-2227
Mfr. Part No.EUB163B
BrandEuropa
R 59.27
Each
units
63 A 1 Type B EUB EU - - - - - - - 230 V ac, 240 V ac -
RS stock no. 419-634
Mfr. Part No.5940S
R 110.49
Each
units
40 A 1 Type B 5940S, EMCH, EUB, S800 Sentry - - - - - - - - -
RS stock no. 381-5849
Mfr. Part No.8750S
R 110.49
Each
units
50 A 1 Type C 8750S Sentry - - - - - - - - -
RS stock no. 191-7224
Mfr. Part No.ALB161
BrandEaton
R 198.26
Each
units
16 A 1 Type B ALB Memera - - - - - - - - -
RS stock no. 199-2966
Mfr. Part No.RS/B20
BrandWylex
R 252.47
Each
units
20 A 1 Type B B Series Plug In - - - - - - - - -
RS stock no. 419-640
Mfr. Part No.5945S
R 110.62
Each
units
45 A 1 Type B 5945S, EMCH, EUB, S800 Sentry - - - - - - - - -
RS stock no. 860-8693
Mfr. Part No.5TT3421
BrandSiemens
R 1,405.88
Each
units
4 A - - 5TT3 Sentron - - - - - - - - -