The Siemens 5SV3642-4KK14 is a 4-pole residual current circuit breaker (RCCB) from the SENTRON family, rated 25 A with a 300 mA trip sensitivity and Type B+ characteristic — meaning it catches smooth DC fault currents that standard AC/DC-sensitive types miss, plus it's short-time delayed to coordinate with downstream devices. It's designed for DIN-rail mounting in distribution boards, occupying 4 modular width units (72 mm) with a 70 mm installation depth. Supply voltage range is 70–440 V AC at 50/60 Hz, covering most standard low-voltage networks in commercial and industrial panels.
Where you'll find this in a panel
The short-time delayed design (SIGRES function) lets you feed supply from top or bottom, even with the switch off, which simplifies busbar routing in multi-row boards. Ambient temperature range is -25 °C to +45 °C during operation, with storage down to -40 °C — fine for unheated utility rooms or outdoor enclosures in moderate climates.
The 5SV3642-4KK14 carries silicon-free construction, which matters for applications like automotive paint lines or semiconductor fabs where silicone outgassing can ruin coatings or optics.