NDB3-125 Series Miniature Circuit Breaker

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Home / Products / MCB / NDB3-125 Series Miniature Circuit Breaker

Updated：July 17,2026 17:50PM

The NDB3-125 Series miniature circuit breaker is suitable for power systems with rated current from 10A to 125A and rated voltage of AC230V/240V AC400V/415V (50/60Hz) or DC80V/DC125V and below. It is used for overload and short-circuit protection and can also be used for infrequent making and breaking operations. It is widely applied in computers and peripheral equipment industrial automation systems telecommunication equipment general power supply systems UPS systems railway locomotives marine electrical systems aerospace applications elevator control systems and mobile power equipment.
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Features of NDB3-125 Series

Hydraulic-magnetic protection with excellent temperature stability.
Accurate trip characteristics with adjustable protection curves.
Flexible mounting, wiring, and operation options.
Compact design for space-saving installation.

Technology data of NDB3-125 Series

Parameter	Specification
Rated operational voltage	AC230V/240V (1P, 1P+N, 2P); AC400V/415V (3P, 3P+N, 4P); DC80V/125V (1P type, 2P type)
Rated current (A)	10, 15, 16, 20, 25, 30, 32, 40, 50, 60, 63, 70, 80, 90, 100, 110, 125
Rated breaking capacity	6kA
Rated impulse withstand voltage	4kV
Certifications	CCC, TUV, CE
Mechanical and electrical life	10,000 operations (including 6,000 electrical operations)

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