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 Model Number Number of Poles Tripping Characteristics Series Range Circuit Breaker Type Mounting Style Overall Depth Overall Width Rated AC Voltage Tripping Mechanism
RS Stock No. 850-8596
Mfr. Part No.EZ9F16103
SGD7.95
Each
units
3A - 1 Type B EZ9 Easy 9 - - - - - -
RS Stock No. 850-8593
Mfr. Part No.EZ9F16110
SGD5.65
Each
units
10A - 1 Type B EZ9 Easy 9 - - - - - -
RS Stock No. 850-8606
Mfr. Part No.EZ9F16120
SGD7.95
Each
units
20A - 1 Type B EZ9 Easy 9 - - - - - -
RS Stock No. 850-8628
Mfr. Part No.EZ9F66110
SGD5.65
Each
units
10A - 1 Type C EZ9 Easy 9 - - - - - -
RS Stock No. 850-8622
Mfr. Part No.EZ9F66116
SGD7.95
Each
units
16A - 1 Type C EZ9 Easy 9 - - - - - -
RS Stock No. 850-8599
Mfr. Part No.EZ9F16106
SGD9.74
Each
units
6A - 1 Type B EZ9 Easy 9 MCB DIN Rail Mount 72mm 18mm 230V Thermal-Magnetic
RS Stock No. 850-8631
Mfr. Part No.EZ9F66120
SGD5.37
Each
units
20A - 1 Type C EZ9 Easy 9 - - - - - -
RS Stock No. 293-1423
Mfr. Part No.0 058 12
BrandLegrand
SGD18.11
Each
units
20A - 1 - - - - - - - - -
RS Stock No. 850-8634
Mfr. Part No.EZ9F66132
SGD5.37
Each
units
32A - 1 Type C EZ9 Easy 9 - - - - - -
RS Stock No. 850-8625
Mfr. Part No.EZ9F66106
SGD7.95
Each
units
6A - 1 Type C EZ9 Easy 9 - - - - - -
New
RS Stock No. 211-2353
Mfr. Part No.M9F21440
SGD121.14
Each
units
40A M9F21440 4 Type B C60SP Multi 9 - - - - - -
New
RS Stock No. 211-2328
Mfr. Part No.M9F21103
SGD29.25
Each
units
3A M9F21103 1 Type B C60SP Multi 9 - - - - - -
New
RS Stock No. 211-2384
Mfr. Part No.M9F23104
SGD29.25
Each
units
4A M9F23104 1 Type D C60SP Multi 9 - - - - - -
New
RS Stock No. 211-2389
Mfr. Part No.M9F23116
SGD25.38
Each
units
16A M9F23116 1 Type D C60SP Multi 9 - - - - - -
New
RS Stock No. 211-2422
Mfr. Part No.M9F42235
SGD131.21
Each
units
35A M9F42235 2 Type C C60BP Multi 9 - - - - - -
New
RS Stock No. 211-2356
Mfr. Part No.M9F22108
SGD28.72
Each
units
8A M9F22108 1 Type C C60SP Multi 9 - - - - - -
New
RS Stock No. 211-2333
Mfr. Part No.M9F21116
SGD18.08
Each
units
16A M9F21116 1 Type B C60SP Multi 9 - - - - - -
New
RS Stock No. 211-2412
Mfr. Part No.M9F42125
SGD57.60
Each
units
25A M9F42125 1 Type C C60BP Multi 9 - - - - - -
New
RS Stock No. 211-2453
Mfr. Part No.M9F43305
SGD192.59
Each
units
5A M9F43305 3 Type D C60BP Multi 9 - - - - - -
RS Stock No. 200-6155
Mfr. Part No.A9PA2606
SGD52.11
Each
units
6A IDT40N XA 1 Type C - Acti9 - - - - - -