The Siemens 5SV3344-3KK60 is a 4-pole residual current circuit breaker (RCCB) from the SENTRON family, rated 40 A, 30 mA AC/DC sensitive, with an additional 6 mA DC detection path branded SIGRES. It is designed for electro-mobility (EV charging) circuits where Type F short-time delayed tripping handles the smooth DC ripple from modern onboard chargers and inverters — standard Type A RCCBs can nuisance-trip or fail to detect those waveforms. The 70 mm depth matches standard distribution board cutouts. Rated IP20 once the distribution board is installed and conductors are connected — this is a panel-mount device, not a standalone outdoor unit.
Rated 40 A at 400 V AC, 4-pole. The 6 mA DC detection (SIGRES) addresses smooth DC fault current from EV inverters. Short-circuit current rating is 10 kA per IEC 61008-1 (0.8 kA rated conditional). The maximum permissible series fuse is 100 A — match that when designing the branch circuit. Operating frequency is 50/60 Hz, supply voltage range 70–440 V AC.
Four modular width units at 60 mm grid spacing means 72 mm of DIN rail. The 70 mm installation depth is standard for SENTRON RCCBs — verify the enclosure depth if retrofitting into a shallow panel. Supplementary devices (e.g., auxiliary switches, shunt trips) can be installed on the right side. The device is silicon-free, which matters for applications where silicone outgassing can contaminate contacts or optics.