The Siemens SIRIUS 3RT2037-1AC24 is a size S2 power contactor rated for 65 A in AC-3 duty at 480 V — that's the motor-switching current, not the resistive load. It handles a 24 V 50/60 Hz coil with screw-type terminals, and mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715. The operating range is -25 to +60 °C, with storage down to -55 °C. This is a current-production part, sourced to order against an RFQ.
DIN-rail fit and panel integration
The 3RT2037-1AC24 snaps onto standard 35 mm DIN rail (DIN EN 60715) with screw and snap-on fastening. Dimensions are 55 mm wide, 114 mm tall, 174 mm deep — that's a compact S2 footprint for a 65 A contactor. Mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, so it fits tight enclosures without special adapters. Clearance around the arcing zone: 10 mm upwards, 10 mm forwards, 6 mm to the side.
Switching capacity and duty cycles
Rated for AC-1 (resistive) at 800 operations/hour, AC-3 (motor start/run) at 700/h, AC-4 (plugging/inching) at 200/h. The AC-3e rating also sits at 700/h. Arcing time runs 10–20 ms; closing time is 10–18 ms. These numbers tell you it's built for frequent cycling in motor control — a conveyor or pump contactor that cycles at speed, not a once-a-day breaker.