Siemens SIRIUS 3RH2131-2KB40 coupling relay switches auxiliary circuits in control panels and motor starter assemblies. It’s sized for an S00 contactor frame and mounts via screw and snap-on onto 35 mm DIN rail. The relay carries a 24 V DC coil with a closing power of 2.8 W and provides 3 instantaneous contacts rated at 10 A at 24 V AC for resistive loads.
Duty and fit
The relay occupies 45 mm width on the DIN rail, with a depth of 73 mm and height of 70 mm. Clearance requirements: 10 mm upward, 10 mm forward, 10 mm downward, and 6 mm to the side. The S00 frame footprint fits alongside standard contactors of the same frame size. Pollution degree 3 rated and operates from -25 to +60 °C; storage range is -55 to +80 °C. Mounting position is flexible: +/-180° rotation and +/-22.5° tilt on a vertical surface. AC rated for 10 A at 24 V and 1 A at 690 V, with a maximum operating rate of 10 000 1/h. DC switching arcing time is 7…20 ms.
Current production part listed as active by Siemens; no last-time-buy or phase-out observed. Source via RFQ for lead time and pricing.