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 mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward and backward.
Contact ratings and switching capability
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. The contactor can switch at up to 10,000 operations per hour on AC, with an arcing time of 10 to 15 ms.
Coil and environmental specifications
The DC magnet coil has a closing power of 4 W and a holding power of 4 W. The unit operates in ambient temperatures from -25 to +60 °C and can be stored from -55 to +80 °C. Pollution degree is 3, and the minimum relative humidity is 10 %. The part is RoHS compliant with a substance prohibition date of October 1, 2009.
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. Minimum clearances to adjacent components are 10 mm upward, 10 mm forward, 10 mm downward, and 6 mm at the side. The product designation confirms it is an auxiliary contactor with auxiliary switch extension capability.