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 Overall Width Rated AC Voltage
RS Stock No. 729-2782
Mfr. Part No.3120-F554-P7T1-W02D-16A
BrandETA
$47.44
Each
units
16 A 2 - 3120-F - - -
RS Stock No. 729-2764
Mfr. Part No.2-5700-IG2-P10-DD-16A
BrandETA
$49.70
Each
units
16 A 1 - 2 5700 - 31mm -
RS Stock No. 798-2192
Mfr. Part No.EUB110B
BrandEuropa
$5.73
Each
units
10 A 1 Type B EUB EU - 230 V ac, 240 V ac
RS Stock No. 729-2770
Mfr. Part No.3120-F554-P7T1-W02D-5A
BrandETA
$34.80
Each
units
5 A 2 - 3120-F - - -
RS Stock No. 798-2205
Mfr. Part No.EUB16B
BrandEuropa
$6.01
Each
units
6 A 1 Type B EUB EU - 230 V ac, 240 V ac
RS Stock No. 729-2758
Mfr. Part No.2-5700-IG2-P10-DD-10A
BrandETA
$52.50
Each
units
10 A 1 - 2 5700 - 31mm -
RS Stock No. 729-2789
Mfr. Part No.3120-F554-P7T1-W02D-10A
BrandETA
$49.85
Each
units
10 A 2 - 3120-F - - -
RS Stock No. 419-640
Mfr. Part No.5945S
$7.85
Each
units
45 A 1 Type B 5945S, EMCH, EUB, S800 Sentry - -
RS Stock No. 798-2218
Mfr. Part No.EUB120B
BrandEuropa
$5.24
Each
units
20 A 1 Type B EUB EU - 230 V ac, 240 V ac
RS Stock No. 729-2760
Mfr. Part No.2-5700-IG2-P10-DD-15A
BrandETA
$30.99
Each
units
15 A 1 - 2 5700 - 31mm -
RS Stock No. 381-5811
Mfr. Part No.8720S
$19.53
Each
units
20 A 1 Type C 8720S Sentry - -
RS Stock No. 729-2802
Mfr. Part No.3120-F554-P7T1-W19DG4-16A
BrandETA
$36.57
Each
units
16 A 2 - 3120-F - - -
RS Stock No. 729-2786
Mfr. Part No.3120-F554-P7T1-W02D-20A
BrandETA
$64.19
Each
units
20 A 2 - 3120-F - - -
RS Stock No. 191-7218
Mfr. Part No.ALB101
BrandEaton
$16.30
Each
units
10 A 1 Type B ALB Memera - -
RS Stock No. 728-8610
Mfr. Part No.104-PR-4A
BrandETA
$20.23
Each
units
4 A 1 - 104-PR - 21mm -
RS Stock No. 419-599
Mfr. Part No.5910S
$8.01
Each
units
10 A 1 Type B 5910S, EMBH, EUB, S800 Sentry - -
RS Stock No. 728-8654
Mfr. Part No.106-P10-10A
BrandETA
$27.81
Each
units
10 A 1 - 106 - 19mm -
RS Stock No. 419-577
Mfr. Part No.5903S
$8.24
Each
units
3 A 1 Type B 5903S, EMBH, S800, Series 1 Sentry - -
RS Stock No. 191-7230
Mfr. Part No.ALB201
BrandEaton
$15.52
Each
units
20 A 1 Type B ALB Memera - -
RS Stock No. 212-2130
Mfr. Part No.3130-F110-P7T1-W14QR7-5A
BrandETA
$31.99
Each
units
5 A 1 - 3130 - - -
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This range of MCB's are suitable for fitting ...
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