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 Breaking Capacity at Maximum Voltage Rating Circuit Breaker Type Mounting Style Overall Depth Overall Dimensions Overall Length Overall Width Rated AC Voltage Tripping Mechanism
RS庫存編號 850-8599
製造零件編號EZ9F16106
HK$38.07
單位
6 A 1 Type B EZ9 Easy 9 - MCB DIN Rail Mount 72mm - - 18mm 230V Thermal-Magnetic
RS庫存編號 850-8596
製造零件編號EZ9F16103
HK$40.21
單位
3 A 1 Type B EZ9 Easy 9 - - - - - - - - -
RS庫存編號 850-8593
製造零件編號EZ9F16110
HK$38.07
單位
10 A 1 Type B EZ9 Easy 9 - - - - - - - - -
RS庫存編號 419-583
製造零件編號5906S
HK$63.44
單位
6 A 1 Type B 5906S, EMBH, EUB, S800 Sentry - - - - - - - - -
RS庫存編號 850-8628
製造零件編號EZ9F66110
HK$40.08
單位
10 A 1 Type C EZ9 Easy 9 - - - - - - - - -
RS庫存編號 850-8638
製造零件編號EZ9F66140
HK$36.96
單位
40 A 1 Type C EZ9 Easy 9 - - - - - - - - -
RS庫存編號 419-634
製造零件編號5940S
HK$63.44
單位
40 A 1 Type B 5940S, EMCH, EUB, S800 Sentry - - - - - - - - -
RS庫存編號 714-2126
製造零件編號RSNHXB32
BrandWylex
HK$53.13
單位
32 A 1 Type B Series 1 NSB 6 kA - DIN Rail Mount 76mm 90 x 18 x 76mm 90mm 18mm - -
RS庫存編號 850-8625
製造零件編號EZ9F66106
HK$36.96
單位
6 A 1 Type C EZ9 Easy 9 - - - - - - - - -
RS庫存編號 850-8612
製造零件編號EZ9F16140
HK$36.96
單位
40 A 1 Type B EZ9 Easy 9 - - - - - - - - -
RS庫存編號 850-8634
製造零件編號EZ9F66132
HK$39.63
單位
32 A 1 Type C EZ9 Easy 9 - - - - - - - - -
RS庫存編號 419-577
製造零件編號5903S
HK$63.44
單位
3 A 1 Type B 5903S, EMBH, S800, Series 1 Sentry - - - - - - - - -
RS庫存編號 293-1417
製造零件編號0 058 11
BrandLegrand
HK$75.83
單位
16 A 1 - - - - - - - - - - - -
RS庫存編號 850-8631
製造零件編號EZ9F66120
HK$39.63
單位
20 A 1 Type C EZ9 Easy 9 - - - - - - - - -
RS庫存編號 419-606
製造零件編號5916S
HK$63.44
單位
16 A 1 Type B 5916S, EMBH, EUB, S800 Sentry - - - - - - - - -
RS庫存編號 191-7202
製造零件編號ALB061
BrandEaton
HK$106.34
單位
6 A 1 Type B ALB Memera - - - - - - - - -
RS庫存編號 381-5782
製造零件編號8706S
HK$49.58
單位
6 A 1 Type C 8706S Sentry - - - - - - - - -
RS庫存編號 199-2972
製造零件編號RS/B32
BrandWylex
HK$156.50
單位
32 A 1 Type B B Series Plug In - - - - - - - - -
RS庫存編號 714-2110
製造零件編號RSNHXB06
BrandWylex
HK$59.37
單位
6 A 1 Type B Series 1 NSB 6 kA - DIN Rail Mount 76mm 90 x 18 x 76mm 90mm 18mm - -
RS庫存編號 850-8616
製造零件編號EZ9F16150
HK$36.96
單位
50 A 1 Type B EZ9 Easy 9 - - - - - - - - -