The Siemens SIRIUS 3RT2037-1AG60 is a Size S2 power contactor rated for 65 A at 480 V — that's the AC-3 motor-switching current, so it handles a 65 A induction motor load at that voltage without welding the main contacts. The coil is screw-type terminals, which means the control wiring lands under a screw clamp, not a spring cage; factor that into your panel wiring labor. It mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715, and the mounting position is flexible: ±180° rotation on a vertical surface, plus ±22.5° tilt forward/backward — useful when you're squeezing it into a tight enclosure.
The depth is 130 mm, width 55 mm, height 114 mm, so it fits a standard 55 mm-wide DIN-rail slot.
Switching performance and auxiliary contacts
It comes with an auxiliary switch (1 NO + 1 NC configuration for the main contacts). Maximum switching rates vary by duty: 800 operations/hour at AC-1 (resistive), 700 at AC-3 (motor), 400 at AC-2 (slip-ring motor), and 200 at AC-4 (plugging/inching). The coil operates at 100 V, 50 Hz with a power factor of 0.36; at 60 Hz it draws 0.39 A.