What this RCCB is and why it matters for EV charging
The Siemens 5SV3324-3KK60 is a SENTRON residual current circuit breaker (RCCB) purpose-built for electro-mobility and EV charging circuits. It's a 2-pole, Type F device rated 40 A with 30 mA residual sensitivity — but the key differentiator is the integrated 6 mA DC SIGRES function, which detects smooth DC fault currents that standard AC/Type A RCCBs miss. That matters because modern EV chargers and inverters can inject DC ripple into the protective earth, blinding a conventional RCD. This unit handles it without nuisance tripping. Rated for 230 V AC at 50/60 Hz, with a short-circuit withstand of 10 kA per IEC 61008-1, it's sized for residential and light commercial charging infrastructure where fault currents stay under that threshold. The short-time delayed design (Type F inherently includes a delay) allows selectivity with downstream 10 ms RCDs, so a fault on a single socket doesn't kill the whole board.
Mounting and panel fit
Snaps onto standard DIN rail (REG) — 4 modular width units (72 mm wide) at 60 mm grid spacing. Depth is 70 mm, matching the standard installation depth for SENTRON distribution boards. Mounting position is any, so it fits vertical or horizontal busbars. IP20 with conductors connected — fine inside a closed distribution board; not for open wet locations.