Auxiliary contactor for control-circuit switching
The Siemens 3RH1140-1AM20 is a SIRIUS auxiliary contactor in size S00, carrying 4 normally-open instantaneous contacts for switching control loads in a panel.
Contact ratings and switching reliability
The contacts are rated for 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V — covering the common control-voltage levels in industrial AC circuits. At 50 Hz the rated operational voltage is 208 V; at 60 Hz it is also 208 V.
Shock resistance is 10g for 5 ms and 5g for 10 ms.
The solid terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm² conductors — spring-cage or screw-clamp depending on variant; this order code uses screw terminals. The depth is the key clearance dimension when wiring behind the contactor on a DIN rail.
Substance prohibitance (RoHS) compliance date is July 1, 2006, covering the EU RoHS directive. The product carries the SIRIUS brand designation.