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 Stock No. 419-640
Mfr. Part No.5945S
PHP345.40
Each
units
45A 1 Type B 5945S, EMCH, EUB, S800 Sentry - - - - - - - - -
RS Stock No. 419-634
Mfr. Part No.5940S
PHP407.86
Each
units
40A 1 Type B 5940S, EMCH, EUB, S800 Sentry - - - - - - - - -
RS Stock No. 850-8612
Mfr. Part No.EZ9F16140
PHP243.66
Each
units
40A 1 Type B EZ9 Easy 9 - - - - - - - - -
RS Stock No. 2552205497
Mfr. Part No.2CSB202001R1400 - DDA202 AC-40/0.03
BrandABB
PHP16,176.12
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2552205496
Mfr. Part No.2CSB202001R1250 - DDA202 AC-25/0.03
BrandABB
PHP12,426.08
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2552205498
Mfr. Part No.2CSB203001R1400 - DDA203 AC-40/0.03
BrandABB
PHP19,029.07
Each
units
- - - - - - - - - - - - - -
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