Part identity and mounting constraints
The Siemens 3RH2140-1BG40-0AA6 is a SIRIUS auxiliary contactor in Size S00, providing 4 normally open instantaneous contacts for control circuit switching. It mounts via screw and snap-on onto a 35 mm DIN rail, with a depth of 73 mm, width of 45 mm, and height of 57.5 mm.
The auxiliary contacts are rated 10 A at 24 V, 10 A at 230 V, 3 A at 400 V, and 1 A at 690 V. At 60 V the rating is 4.7 A, at 110 V it is 3 A, at 220 V it is 1.2 A, at 440 V it is 0.5 A, at 500 V it is 2 A, and at 600 V it is 0.26 A. The mechanical life is typically 30,000,000 operating cycles.
Coil and environmental specifications
The DC magnet coil has a closing power of 4 W and a holding power of 4 W. Pollution degree is 3, and the minimum relative humidity is 10 %.
Wiring and clearance requirements
Terminals accept solid or stranded wire: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm². The product designation confirms it is an auxiliary contactor with auxiliary switch extension capability.