Siemens 5SP4392-6 Miniature Circuit Breaker MCB

Siemens 5SP4392-6 is a 3-pole SENTRON miniature circuit breaker designed for 400 V AC distribution, with a rated current (In) of 125 A and a B-type trip curve, engineered to respond to overcurrents typical of industrial loads. It provides a short-circuit breaking capacity of 10 kA (Icu) at 400 V, making it suitable for feeders and equipment in demanding environments. The device has a depth of 70 mm and is part of the SENTRON 5SP4 family, offering compact, modular protection for low-voltage panels. It is well-suited for circuits feeding motors, pumps, control circuits, and lighting in industrial and infrastructure applications, and supports coordination with upstream protection devices when properly selected. With three poles and a high breaking capacity, it is designed for multi-wire circuits in commercial or industrial installations and integrates with Siemens protection-device ecosystems for consistent performance across panels.