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庫存編號 180-6101
製造零件編號0 058 48
BrandLegrand
HK$824.95
毎盒:2 個
Box(es)
- - - - - - - - - - - -
RS庫存編號 293-1423
製造零件編號0 058 12
BrandLegrand
HK$95.52
單位
20 A - 1 - - - - - - - - -
RS庫存編號 200-6152
製造零件編號A9PE4620
HK$746.55
單位
20 A IDT40N XA 1 Type C - Acti9 - - - - - -
RS庫存編號 200-6179
製造零件編號M9F42210
HK$1,293.11
單位
10 A C60BP 2 Type C - Acti9 - - - - - -
RS庫存編號 200-6153
製造零件編號A9PA2620
HK$351.15
單位
20 A IDT40N XA 1 Type C - Acti9 - - - - - -
RS庫存編號 200-6147
製造零件編號A9PE4610
HK$517.59
單位
10 A IDT40N XA 1 Type C - Acti9 - - - - - -
RS庫存編號 200-6161
製造零件編號A9DA3732
HK$4,734.62
單位
32 A IDD40N 3 Type C - Acti9 - - - - - -
RS庫存編號 200-6156
製造零件編號A9PA2710
HK$1,378.63
單位
10 A IDT40N XA 3 Type C - Acti9 - - - - - -
RS庫存編號 200-6150
製造零件編號A9PA4620
HK$768.97
單位
20 A IDT40N XA 1 Type C - Acti9 - - - - - -
RS庫存編號 200-6163
製造零件編號A9PA2602
HK$416.44
單位
2 A IDT40T XA 1 Type C - Acti9 - - - - - -
RS庫存編號 850-8600
製造零件編號EZ9F16125
HK$44.25
單位
25 A - 1 Type B EZ9 Easy 9 - - - - - -
RS庫存編號 200-6180
製造零件編號M9F43102
HK$627.47
單位
2 A C60BP 1 Type D - Acti9 - - - - - -
RS庫存編號 200-6154
製造零件編號A9PE2620
HK$340.81
單位
20 A IDT40N XA 1 Type C - Acti9 - - - - - -
RS庫存編號 200-6168
製造零件編號A9PE2616
HK$311.61
單位
16 A IDD40T XA 1 Type C - Acti9 - - - - - -
RS庫存編號 200-6160
製造零件編號A9DP3716
HK$4,136.22
單位
16 A IDD40N XA 3 Type C - Acti9 - - - - - -
RS庫存編號 850-8647
製造零件編號EZ9F66150
HK$44.04
單位
50 A - 1 Type C EZ9 Easy 9 - - - - - -
RS庫存編號 200-6174
製造零件編號A9PA4732
HK$1,629.78
單位
32 A IDD40T XA 3 Type C - Acti9 - - - - - -
RS庫存編號 200-6157
製造零件編號A9DP2616
HK$2,222.42
單位
16 A IDD40T XA 1 Type C - Acti9 - - - - - -
RS庫存編號 200-6172
製造零件編號A9PA2725
HK$1,527.71
單位
25 A IDD40T XA 3 Type C - Acti9 - - - - - -
RS庫存編號 200-6149
製造零件編號A9PE4616
HK$701.04
單位
16 A IDT40N XA 1 Type C - Acti9 - - - - - -