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
New
RS stock no. 211-2425
Mfr. Part No.M9F42303
R 2,306.63
Each
units
3 A M9F42303 3 Type C C60BP Multi 9 - - - - - -
New
RS stock no. 211-2426
Mfr. Part No.M9F42305
R 2,285.76
Each
units
5 A M9F42305 3 Type C C60BP Multi 9 - - - - - -
New
RS stock no. 211-2435
Mfr. Part No.M9F43103
R 749.53
Each
units
3 A M9F43103 1 Type D C60BP Multi 9 - - - - - -
New
RS stock no. 211-2427
Mfr. Part No.M9F42306
R 2,118.04
Each
units
6 A M9F42306 3 Type C C60BP Multi 9 - - - - - -
New
RS stock no. 211-2445
Mfr. Part No.M9F43204
R 1,594.43
Each
units
4 A M9F43204 2 Type D C60BP Multi 9 - - - - - -
New
RS stock no. 211-2428
Mfr. Part No.M9F42308
R 2,118.04
Each
units
8 A M9F42308 3 Type C C60BP Multi 9 - - - - - -
New
RS stock no. 211-2471
Mfr. Part No.M9U21204
R 2,281.43
Each
units
4 A M9U21204 2 Type C C60H-DC Multi 9 - - - - - -
New
RS stock no. 211-2437
Mfr. Part No.M9F43104
R 742.29
Each
units
4 A M9F43104 1 Type D C60BP Multi 9 - - - - - -
RS stock no. 200-6156
Mfr. Part No.A9PA2710
R 2,168.16
Each
units
10 A IDT40N XA 3 Type C - Acti9 - - - - - -
New
RS stock no. 211-2446
Mfr. Part No.M9F43206
R 1,463.89
Each
units
6 A M9F43206 2 Type D C60BP Multi 9 - - - - - -
New
RS stock no. 211-2429
Mfr. Part No.M9F42325
R 2,138.58
Each
units
25 A M9F42325 3 Type C C60BP Multi 9 - - - - - -
New
RS stock no. 211-2438
Mfr. Part No.M9F43106
R 678.98
Each
units
6 A M9F43106 1 Type D C60BP Multi 9 - - - - - -
RS stock no. 200-6154
Mfr. Part No.A9PE2620
R 541.04
Each
units
20 A IDT40N XA 1 Type C - Acti9 - - - - - -
New
RS stock no. 211-2399
Mfr. Part No.M9F23302
R 1,131.20
Each
units
2 A M9F23302 3 Type D C60SP Multi 9 - - - - - -
New
RS stock no. 211-2345
Mfr. Part No.M9F21332
R 1,117.86
Each
units
32 A M9F21332 3 Type B C60SP Multi 9 - - - - - -
New
RS stock no. 211-2349
Mfr. Part No.M9F21410
R 1,387.87
Each
units
10 A M9F21410 4 Type B C60SP Multi 9 - - - - - -
New
RS stock no. 211-2447
Mfr. Part No.M9F43220
R 1,463.89
Each
units
20 A M9F43220 2 Type D C60BP Multi 9 - - - - - -
New
RS stock no. 211-2401
Mfr. Part No.M9F23310
R 1,012.23
Each
units
10 A M9F23310 3 Type D C60SP Multi 9 - - - - - -
New
RS stock no. 211-2455
Mfr. Part No.M9F43310
R 2,018.46
Each
units
10 A M9F43310 3 Type D C60BP Multi 9 - - - - - -
RS stock no. 200-6157
Mfr. Part No.A9DP2616
R 3,437.24
Each
units
16 A IDD40T XA 1 Type C - Acti9 - - - - - -