The Siemens 3RT2037-1AK60-ZX95 is a SIRIUS power contactor in size S2, rated for motor switching up to 65 A at 480 V and 10 hp at 230 V. It uses screw-type terminals for the coil and main contacts, and mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715. The operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C.
Panel integration is straightforward: the 55 mm wide, 114 mm high, 130 mm deep footprint fits standard DIN-rail enclosures. Clearance requirements are 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side. The mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward, giving flexibility in tight cabinets.
Mechanical life is rated at 10 million operations typical. Switching frequency varies by duty: AC-1 resistive loads up to 800 cycles/hour, AC-3 motor loads up to 700 cycles/hour, and AC-4 plugging/reversing up to 200 cycles/hour. The auxiliary switch is included, with contact ratings from 10 A at 24 V down to 0.3 A at 220 V.