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. 798-2209
Mfr. Part No.EUB132B
BrandEuropa
$6.33
Each
units
32A Type B EUB EU 230 V ac, 240 V ac 1
RS Stock No. 798-2211
Mfr. Part No.EUB125B
BrandEuropa
$4.42
Each
units
25A Type B EUB EU 230 V ac, 240 V ac 1
RS Stock No. 798-2218
Mfr. Part No.EUB120B
BrandEuropa
$5.88
Each
units
20A Type B EUB EU 230 V ac, 240 V ac 1
RS Stock No. 381-5811
Mfr. Part No.8720S
$16.76
Each
units
20A Type C 8720S Sentry - 1
RS Stock No. 798-2192
Mfr. Part No.EUB110B
BrandEuropa
$6.43
Each
units
10A Type B EUB EU 230 V ac, 240 V ac 1
RS Stock No. 293-1423
Mfr. Part No.0 058 12
BrandLegrand
$14.55
Each
units
20A - - - - 1
RS Stock No. 229-7919
Mfr. Part No.ALB501
BrandEaton
$23.14
Each
units
50A Type B ALB Memera - 1
RS Stock No. 419-606
Mfr. Part No.5916S
$8.99
Each
units
16A Type B 5916S, EMBH, EUB, S800 Sentry - 1
RS Stock No. 419-634
Mfr. Part No.5940S
$8.81
Each
units
40A Type B 5940S, EMCH, EUB, S800 Sentry - 1
RS Stock No. 798-2224
Mfr. Part No.EUB150B
BrandEuropa
$4.88
Each
units
50A Type B EUB EU 230 V ac, 240 V ac 1
RS Stock No. 419-599
Mfr. Part No.5910S
$8.99
Each
units
10A Type B 5910S, EMBH, EUB, S800 Sentry - 1
RS Stock No. 419-612
Mfr. Part No.5920S
$8.81
Each
units
20A Type B 5920S, EMBH, EUB, S800 Sentry - 1
RS Stock No. 293-1417
Mfr. Part No.0 058 11
BrandLegrand
$17.54
Each
units
16A - - - - 1
RS Stock No. 191-7268
Mfr. Part No.ALB401
BrandEaton
$19.78
Each
units
40A Type B ALB Memera - 1
RS Stock No. 798-2215
Mfr. Part No.EUB140B
BrandEuropa
$4.42
Each
units
40A Type B EUB EU 230 V ac, 240 V ac 1
RS Stock No. 381-5776
Mfr. Part No.5950S
$8.82
Each
units
50A Type B 5950S Sentry - 1
RS Stock No. 381-5805
Mfr. Part No.8716S
$20.69
Each
units
16A Type C 8716S Sentry - 1
RS Stock No. 191-7252
Mfr. Part No.ALB321
BrandEaton
$23.30
Each
units
32A Type B ALB Memera - 1
RS Stock No. 381-5849
Mfr. Part No.8750S
$23.14
Each
units
50A Type C 8750S Sentry - 1
RS Stock No. 798-2202
Mfr. Part No.EUB116B
BrandEuropa
$6.13
Each
units
16A Type B EUB EU 230 V ac, 240 V ac 1
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