The Siemens SENTRON 5SV3621-4 is a 2-pole residual current operated circuit breaker (RCCB) rated 16 A with 300 mA sensitivity, Type B characteristic, short-time delayed, for 230 V AC supply.
Type B detection covers AC, pulsating DC, and smooth DC residual currents up to 1 kHz — the right choice when variable-speed drives, UPS systems, or EV chargers are downstream and a standard Type A would miss the DC component. Supply voltage for the test circuit spans 70–250 V AC, 50/60 Hz, meaning the internal test button and the SIGRES function stay operational across a wide mains range.
Deployment context
The top or bottom supply feed (top preferred when the SIGRES function must remain active in the switched-off state) gives the installer flexibility when busbar routing is tight. Silicon-free construction suits environments where outgassing would contaminate coatings or optics.