SIRIUS S2 power contactor — 65 A at 480 V, screw-type coil terminals
The Siemens 3RT2037-1AP64 is a SIRIUS S2 power contactor, Size S2, with screw-type terminals on the magnet coil. Its headline rating is 65 A in AC-3 duty at 480 V — that's the motor-switching current it handles for standard squirrel-cage induction motors, so it's sized for loads like conveyors, pumps, and fans up to that current draw. Mounting is screw and snap-on onto 35 mm DIN rail per DIN EN 60715. The 55 mm width and 114 mm height footprint fit standard panel layouts; depth is 174 mm. Mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward — useful when the panel layout forces an unconventional orientation.
Switching frequency and mechanical life
Maximum switching rates: 800 cycles/hour at AC-1 (resistive loads), 700 at AC-3 (motor loads), 400 at AC-2 (slip-ring motors), and 200 at AC-4 (plugging/inching). The AC-3e rating matches the AC-3 maximum at 700 cycles/hour. Mechanical life is 10,000,000 operations typical — that's the contactor body itself, not the contacts under load.
Coil and auxiliary contact specs
The coil draws 0.36 A at 50 Hz and 0.39 A at 60 Hz at 220 V rated value. No auxiliary switch is built in — this is a main contactor only, so add a separate auxiliary contact block if you need feedback or interlocking. Arcing time is 10 to 20 ms; operate time is 10 to 18 ms. Main contacts are 18 to 1 — that's the normally-open/normally-closed configuration.
Clearances and environmental limits
Required clearance distances: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side. Operating temperature range is -25 to +60 °C; storage range is -55 to +80 °C. The storage limit governs handling and warehousing, not running conditions.