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WATSN400-400A

The WATSN400 is a 400A molded case circuit breaker designed for overcurrent and short-circuit protection in low-voltage distribution systems. With a fixed-mount design and electronic trip unit, it provides reliable protection for main circuits and large loads in industrial and commercial applications.

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Specifications Parameter Specification Model WATSN400 Frame Size 400A Rated Current (In) 400 A (adjustable) Poles Typically 3P or 4P (specify when ordering) Rated Operational Voltage (Ue) 400 V AC 50/60 Hz Breaking Capacity (Icu) 36 kA at 400 V AC Trip Unit Electronic Micrologic 2.0/5.0/6.0 Protection Functions Long-time, short-time, instantaneous, ground fault Mounting Fixed type Connection Capacity 95‑240 mm² (copper cable) Ambient Temperature Range –25 °C to +70 °C Mechanical Life 8,500 operations Standards IEC 60947‑2, GB 14048.2 Communication Optional communication module Primary Applications Main distribution switchboards Industrial power supply and motor control centers Large commercial buildings and data centers Generator and transformer protection