NDB6LM-40 Series Residual Current Operated Circuit Breaker

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Updated：July 17,2026 17:52PM

The NDB6LM-40 Series residual current operated circuit breaker is suitable for industrial and civil building applications with a rated voltage of AC230V and a rated breaking capacity of 10kA.
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Features of NDB6LM-40 Series

Residual current operation is independent of the main circuit voltage, ensuring more reliable performance.
When the circuit breaker is switched off normally or trips due to fault protection, both the phase line and neutral line are disconnected, preventing hazards caused by a live neutral line fault.
During making and breaking operations, the neutral line closes first and opens last. It provides overload protection, short-circuit protection, and leakage protection for comprehensive protection.
Dual-function terminals provide convenient and reliable wiring.
Installed on a TH35mm standard mounting rail.

Technology data of NDB6LM-40 Series

Parameter	Specification
Rated operational voltage	AC230V
Tripping characteristic	Type B: instantaneous tripping current 3-5In Type C: instantaneous tripping current 5-10In
Rated residual operating current	0.030A, 0.100A, 0.300A
Breaking capacity	10kA
Trip unit type	A, AC

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