Miniature circuit breakers

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Miniature circuit breakers

MCBs and board protection devices—mainly Schneider Acti9 ranges, plus Hager, Legrand, GSC.

Match poles, amp rating, trip curve and breaking capacity.

FAQ

Frequently asked questions

MCBs and RCDs · poles, amp rating and trip curve

What is a miniature circuit breaker (MCB)?

A protective device that trips on overload or short circuit, usually modular (DIN rail). This category is mainly Schneider Acti9 / C60 / iC60 / C120, plus Hager, Legrand, GSC and others.

What should I check to choose the right model?

Key data: number of poles, rated current (A), trip curve (B, C, D…) and breaking capacity (kA), plus voltage. When replacing, note brand, amps, poles and curve on the front of the existing unit.

What do curves B, C and D mean?

They set the instantaneous trip threshold. Homes often use curve C; B is more sensitive; D tolerates higher inrush. Confirm with your installer or wiring diagram.

Are MCBs and RCDs the same?

No. An MCB protects the circuit from overload/short. An RCD / residual-current device protects against earth leakage (often 30 mA). Do not swap them.

How many poles do I need (1P, 2P, 3P, 4P)?

Depends on the circuit: 1P one phase; 2P common in single-phase; 3P/4P in three-phase. Match the existing arrangement.

Can I install it myself?

Consumer units involve safety and usually a qualified electrician. We supply the product; installation is their responsibility.

Which brands do you stock?

Mostly Schneider Electric, also Hager, Legrand, GSC and others. Filter by brand, amp rating or poles.

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