The Siemens SENTRON 5SV4316-0 is a 2-pole residual current circuit breaker (RCCB), Type AC, rated 63 A with 30 mA sensitivity at 230 V AC. This is the part you reach for when a distribution board calls for a 2-module-width (36 mm) instantaneous RCCB on a 50 Hz single-phase supply.
Snaps onto DIN rail (REG) and occupies 2 modular width units at 60 mm grid spacing — 36 mm wide, 90 mm tall, 70 mm deep. Mounting position is unrestricted, and supply can enter from top or bottom. The IP20 rating applies when installed in a distribution board with conductors connected; this is the standard protection level for enclosed panel-mount gear, not for open-chassis or washdown locations.
The 10 kA SCCR (0.8 kA per IEC 61008-1) is the conditional short-circuit rating with the specified backup fuse — the maximum permissible series fuse short-circuit current is 80 A.