MCCB circuit breaker CSDM7-125L-4300 CSDM7-125-4300 4P 125A 125a mccb industrial circuit breaker thermal and magnetic circuit breaker

Precise response with thermal-magnetic dual protection.In case of overload, the bimetallic strip "thermal expansion" triggers slow tripping (to avoid false triggering by instantaneous current); in case of short circuit, the electromagnetic coil "instantaneous attraction" realizes quick power cutoff (fault interruption in ≤0.1s). It is suitable for low-short-circuit current scenarios such as households, small shops and office lighting, ensuring no "false operation" or "delay" in protection.

25KA breaking capacity with strong scene adaptability.For basic scenarios where the short-circuit current of the power distribution system is ≤25KA (e.g., multi-story residences, small commercial outlets), there is no need to pursue high-cost high-breaking-capacity models. It achieves "sufficiency as optimization" through reasonable configuration, reducing the overall investment in the power distribution system.

4P Full-pole protection for safer electricity use.In three-phase four-wire circuits, the live and neutral wires are switched on and off synchronously, avoiding the risk of neutral wire electrification caused by unbalanced single-phase/three-phase loads. Meanwhile, it supports neutral wire overload protection, suitable for three-phase power equipment such as air conditioners and water pumps, as well as mixed power distribution scenarios with multiple circuits.