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 Rated AC Voltage Number of Poles
RS Stock No. 798-2192
Mfr. Part No.EUB110B
BrandEuropa
$5.84
Each
units
10 A Type B EUB EU 230 V ac, 240 V ac 1
RS Stock No. 798-2205
Mfr. Part No.EUB16B
BrandEuropa
$6.13
Each
units
6 A Type B EUB EU 230 V ac, 240 V ac 1
RS Stock No. 419-640
Mfr. Part No.5945S
$8.01
Each
units
45 A Type B 5945S, EMCH, EUB, S800 Sentry - 1
RS Stock No. 381-5811
Mfr. Part No.8720S
$17.93
Each
units
20 A Type C 8720S Sentry - 1
RS Stock No. 798-2218
Mfr. Part No.EUB120B
BrandEuropa
$5.34
Each
units
20 A Type B EUB EU 230 V ac, 240 V ac 1
RS Stock No. 419-577
Mfr. Part No.5903S
$7.91
Each
units
3 A Type B 5903S, EMBH, S800, Series 1 Sentry - 1
RS Stock No. 191-7218
Mfr. Part No.ALB101
BrandEaton
$16.63
Each
units
10 A Type B ALB Memera - 1
RS Stock No. 419-599
Mfr. Part No.5910S
$8.17
Each
units
10 A Type B 5910S, EMBH, EUB, S800 Sentry - 1
RS Stock No. 191-7230
Mfr. Part No.ALB201
BrandEaton
$15.83
Each
units
20 A Type B ALB Memera - 1
RS Stock No. 381-5782
Mfr. Part No.8706S
$8.83
Each
units
6 A Type C 8706S Sentry - 1
RS Stock No. 419-612
Mfr. Part No.5920S
$8.01
Each
units
20 A Type B 5920S, EMBH, EUB, S800 Sentry - 1
RS Stock No. 419-634
Mfr. Part No.5940S
$8.01
Each
units
40 A Type B 5940S, EMCH, EUB, S800 Sentry - 1
RS Stock No. 419-583
Mfr. Part No.5906S
$7.96
Each
units
6 A Type B 5906S, EMBH, EUB, S800 Sentry - 1
RS Stock No. 798-2224
Mfr. Part No.EUB150B
BrandEuropa
$4.44
Each
units
50 A Type B EUB EU 230 V ac, 240 V ac 1
RS Stock No. 381-5776
Mfr. Part No.5950S
$8.02
Each
units
50 A Type B 5950S Sentry - 1
RS Stock No. 381-5805
Mfr. Part No.8716S
$18.81
Each
units
16 A Type C 8716S Sentry - 1
RS Stock No. 798-2227
Mfr. Part No.EUB163B
BrandEuropa
$5.03
Each
units
63 A Type B EUB EU 230 V ac, 240 V ac 1
RS Stock No. 293-1423
Mfr. Part No.0 058 12
BrandLegrand
$13.23
Each
units
20 A - - - - 1
RS Stock No. 798-2211
Mfr. Part No.EUB125B
BrandEuropa
$4.02
Each
units
25 A Type B EUB EU 230 V ac, 240 V ac 1
RS Stock No. 191-7202
Mfr. Part No.ALB061
BrandEaton
$17.24
Each
units
6 A Type B ALB Memera - 1
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