What this RCCB is and where it lands
The Siemens 5SV3646-6KK01 is a SENTRON residual current operated circuit breaker (RCCB) — 4-pole, Type A, short-time delayed, rated 63 A with a 300 mA trip threshold on a 230/400 V AC supply. It sits in the distribution board protecting circuits against earth faults, with the short-time delay allowing selectivity against downstream RCCBs so only the faulted branch drops out.
The 60 mm grid spacing matches standard European distribution board cutouts. Supply can enter from top or bottom — no orientation restriction during install. IP20 rating applies once the distribution board is closed and conductors are connected — fine for enclosed panelboards, not for open wet-area mounting without an outer enclosure.
