Siemens 5SV4446-0LA — 4-pole RCCB for 400 V AC panels
The Siemens 5SV4446-0LA is a SENTRON 5SV4-series residual-current circuit breaker (RCCB) with four poles, rated 63 A at 230/400 V AC. It trips on AC fault currents at a rated residual current of 100 mA, instantaneous — no short-time delay. Mounts on DIN rail (REG), occupies 4 width units (72 mm), and accepts conductors from 0.75 to 35 mm² solid or stranded.
Rated 63 A continuous at ambient temperatures up to 60 °C. Above that, derating applies: 57.35 A at 65 °C, 48.84 A at 70 °C. Mounting position is unrestricted.