Integrator note — 3RH1140-2BG40
Siemens SIRIUS auxiliary contactor 3RH1140-2BG40 is a size S00 relay block with four normally-open instantaneous contacts, no delayed or make-before-break switching. Rated AC-12 at 10 A, it handles resistive loads in control circuits — think PLC output isolation or contactor coil switching. Coil draws 3.2 W DC holding power, so no thermal nuisance on a crowded DIN rail; the 125 V DC coil sits within standard 110–125 V control buses.
AC-12 10 A is the resistive load rating — switching solenoids or contactor coils at up to 10 A. At 230 V the contactor is rated 6 A, at 400 V it drops to 3 A, at 690 V to 1 A. That derating follows the arc-extinction limit: higher voltage, lower current. The 24 V DC rating is 10 A, same as AC-12, so it works in 24 V control panels without derating.
Screw and snap-on mounting for 35 mm DIN rail. Width 45 mm, height 60 mm, depth 73 mm — fits standard S00 footprint.
Lifecycle stage is current — no phase-out notice. This is a standard catalog part in the SIRIUS family. Compliance with RoHS substance prohibitance date 07/01/2006.