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. 850-8631
Mfr. Part No.EZ9F66120
TWD173.00
Each
units
20 A - 1 Type C EZ9 Easy 9 - - - - - -
RS Stock No. 850-8622
Mfr. Part No.EZ9F66116
TWD173.00
Each
units
16 A - 1 Type C EZ9 Easy 9 - - - - - -
RS Stock No. 850-8606
Mfr. Part No.EZ9F16120
TWD173.00
Each
units
20 A - 1 Type B EZ9 Easy 9 - - - - - -
New
RS Stock No. 200-6178
Mfr. Part No.M9F42108
TWD2,640.00
Each
units
8 A C60BP 1 Type C - Acti9 - - - - - -
New
RS Stock No. 200-6150
Mfr. Part No.A9PA4620
TWD2,872.00
Each
units
20 A IDT40N XA 1 Type C - Acti9 - - - - - -
New
RS Stock No. 200-6181
Mfr. Part No.M9F43208
TWD5,765.00
Each
units
8 A Me C60BP 2 Type D - Acti9 - - - - - -
New
RS Stock No. 200-6158
Mfr. Part No.A9PA2716
TWD5,149.00
Each
units
16 A IDD40T XA 3 Type C - Acti9 - - - - - -
New
RS Stock No. 200-6146
Mfr. Part No.A9PA4610
TWD2,697.00
Each
units
10 A IDT40N XA 1 Type C - Acti9 - - - - - -
New
RS Stock No. 200-6153
Mfr. Part No.A9PA2620
TWD1,311.00
Each
units
20 A IDT40N XA 1 Type C - Acti9 - - - - - -
RS Stock No. 850-8593
Mfr. Part No.EZ9F16110
TWD173.00
Each
units
10 A - 1 Type B EZ9 Easy 9 - - - - - -
New
RS Stock No. 200-6179
Mfr. Part No.M9F42210
TWD4,830.00
Each
units
10 A C60BP 2 Type C - Acti9 - - - - - -
New
RS Stock No. 200-6152
Mfr. Part No.A9PE4620
TWD2,788.00
Each
units
20 A IDT40N XA 1 Type C - Acti9 - - - - - -
New
RS Stock No. 200-6154
Mfr. Part No.A9PE2620
TWD1,273.00
Each
units
20 A IDT40N XA 1 Type C - Acti9 - - - - - -
New
RS Stock No. 200-6162
Mfr. Part No.A9DV2625
TWD8,882.00
Each
units
25 A IDD40T TG 1 Type C - Acti9 - - - - - -
RS Stock No. 850-8596
Mfr. Part No.EZ9F16103
TWD173.00
Each
units
3 A - 1 Type B EZ9 Easy 9 - - - - - -
New
RS Stock No. 200-6180
Mfr. Part No.M9F43102
TWD2,344.00
Each
units
2 A C60BP 1 Type D - Acti9 - - - - - -
RS Stock No. 850-8619
Mfr. Part No.EZ9F16132
TWD168.00
Each
units
32 A - 1 Type B EZ9 Easy 9 - - - - - -
New
RS Stock No. 200-6148
Mfr. Part No.A9PA4616
TWD2,697.00
Each
units
16 A IDT40N XA 1 Type C - Acti9 - - - - - -
New
RS Stock No. 200-6172
Mfr. Part No.A9PA2725
TWD5,706.00
Each
units
25 A IDD40T XA 3 Type C - Acti9 - - - - - -
New
RS Stock No. 200-6159
Mfr. Part No.A9PA2732
TWD5,865.00
Each
units
32 A IDD40T XA 3 Type C - Acti9 - - - - - -