The Siemens 5SV3626-4 is a 2-pole residual current circuit breaker (RCCB) from the SENTRON family, rated 63 A at 40 °C with a 300 mA tripping fault current and Type B residual current sensitivity. Type B means it detects smooth DC residual currents, AC sinusoidal residuals, and pulsed DC — the full spectrum you get from variable-speed drives, UPS systems, and PV inverters. The short-time delayed design gives it selectivity upstream of standard RCCBs, so a downstream fault clears without taking this device out. Rated short-circuit current withstand is 10 kA per IEC 61008-1, with an I²t value of 70,000 A²·s.
Deployment context
Depth is 70 mm — check your enclosure depth before committing; some shallow consumer units won't clear it. Rated for 50 Hz supply and overvoltage category III.
Holds 63 A continuous from 40 °C up to 60 °C (–). At 65 °C it derates to 55 A; at 70 °C to 48 A. If you're mounting it in a hot panel near drives or transformers, factor the 65 °C derating step into your load budget.