The Siemens SENTRON 5SV3346-4KK60 is a 4-pole residual current circuit breaker (RCCB) rated 63 A, 30 mA, Type B, with a 6 mA DC component detection — purpose-built for mobile installations and circuits where mixed-frequency fault currents from VFDs, UPS systems, or EV chargers are present. Type B means it catches smooth DC fault currents that a standard AC/Type A device would miss, so it's the right choice for modern power-electronics-fed loads. Rated 400 V AC, 50/60 Hz, with a 10 kA short-circuit current rating (SCCR) per IEC 61008-1. The short-time delayed design (SIGRES function) provides selectivity upstream, letting a downstream fault clear before this device trips — critical for keeping the rest of the panel live during a ground fault on one branch.
Depth of 70 mm matches the common SENTRON MCB/RCCB footprint — fits existing 70 mm deep distribution boards without re-glanding. The 72 mm width (4 MW) is one slot wider than a 3-pole MCB; plan the DIN-rail fill accordingly when replacing a 3-pole device. Supply can enter top or bottom; the SIGRES function remains active even in the switched-off state when fed from the top. Silicon-free construction — suitable for applications where silicone outgassing is prohibited (paint lines, potting stations).