Siemens SIRIUS 3RH1422-1HF40-0LA0 — Auxiliary Contactor, Size S00, 110 V DC Coil
It carries a 110 V DC coil and provides 2 normally-open plus 2 normally-closed instantaneous contacts, giving you four isolated poles for signal routing or interlock logic. Rated switching capacity varies with the load voltage: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V — these are the thermal current ratings per IEC/EN 60947, so the contactor can handle those currents in AC-15 or DC-13 duty within the respective voltage class. The 110 V DC coil draws 11 W on pick-up and holds at 4 W, which keeps the control transformer load predictable.
The size S00 footprint is 90 mm wide, 57.5 mm tall, and 72 mm deep — compact enough for dense terminal-block rows. Wire capacity on the auxiliary contacts accepts solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm², plus the AWG equivalents. Front-side protection is IP20, so the contactor is finger-safe once installed behind a panel door. Shock resistance is specified at 10g / 5 ms and 5g / 10 ms, which covers most industrial vibration profiles from conveyors and compressors.
RoHS compliance date is July 1, 2006, so the contactor meets the original RoHS directive.