S00 auxiliary contactor for panel builders
The 3RH2140-4BW40 is a SIRIUS auxiliary contactor in size S00 — the smallest frame in the Siemens SIRIUS family, designed for control-circuit switching in motor starter and relay logic panels.
Rated currents and switching capability
The rated impulse withstand voltage is 6 kV, which supports installation in environments with surge category III per IEC 60947-1, typical for industrial control panels fed from a 400 V distribution system.
