The Siemens 5SV5646-6 is a 4-pole residual current circuit breaker (RCCB) from the SENTRON family, rated 63 A with a 300 mA residual trip threshold, Type A, for 230/400 V AC 50 Hz networks. The 6 kA short-circuit current rating (SCCR) per IEC 61008-1 means the device can safely interrupt a fault up to that level without welding contacts or cascading damage upstream; the 0.8 kA rated conditional short-circuit current with the specified series fuse (max 80 A) covers the coordination requirement for most residential and light commercial distribution boards.
Snaps onto a DIN rail (REG) in any mounting position, occupying 4 modular width units at 60 mm grid spacing. The 70 mm installation depth matches standard distribution board enclosures — no deep-can requirement.