The Siemens 5SV5642-0 is a SENTRON 4-pole residual current circuit breaker (RCCB), Type AC, rated 25 A with 300 mA sensitivity at 400 V AC. It's an instantaneous-trip device — no intentional delay — designed for fast disconnection on sinusoidal AC earth faults. The 70 mm installation depth matches standard distribution board cutouts.
Rated for 50 Hz only — not suitable for 60 Hz installations. The supply voltage is 230/400 V AC, typical for three-phase four-wire systems in IEC markets. Top or bottom feed is acceptable. IP20 protection applies when installed in a distribution board with conductors connected — the enclosure itself provides finger protection, but the unit is not rated for wet or dusty environments. The wider storage limits cover handling and logistics, not running conditions. Mechanical service life is 2,000 operating cycles typical.