Siemens SIRIUS 3RT2037-1AG24 — Size S2 Power Contactor
The Siemens SIRIUS 3RT2037-1AG24 is a size S2 power contactor rated for 65 A at 480 V, making it suitable for switching motor loads and resistive circuits in control panels. It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, with a mounting position allowing ±180° rotation on vertical surfaces and ±22.5° tilt forward/backward. The main contact configuration is 3-pole normally open (3 NO), with no built-in auxiliary switch — auxiliary contact blocks are added separately as needed. Coil connections use screw-type terminals, and the operating temperature range spans -25 to +60 °C, with storage from -55 to +80 °C.
Switching Duty & Ratings
This contactor is rated for AC-3 motor switching up to 700 operations per hour (max) and AC-1 resistive loads at 800 ops/h. For demanding AC-4 inching/plugging duty, the maximum is 200 ops/h. The AC-3e rating matches the AC-3 figure at 700 ops/h. Arcing time is 10–20 ms, with closing time of 10–18 ms. The 65 A rating at 480 V is the headline motor-switching current for this frame size. For reference, the same contactor carries 3 A at 400 V and 0.6 A at 440 V in other duty classes — always verify the specific utilization category against your load.
Dimensions & Panel Fit
The 3RT2037-1AG24 measures 55 mm wide, 114 mm high, and 174 mm deep. Required clearances: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the sides. These dimensions fit standard S2 contactor spacing on DIN rail; verify side clearance if mounting multiple units side-by-side without spacing accessories.