What This Contactor Is and Where It Fits
The Siemens SIRIUS 3RT2036-1AD00 is a Size S2 power contactor rated for 52 A at 480 V in AC-3 duty — the standard motor-switching category per IEC 60947-4-1. That rating means it handles the locked-rotor inrush and breaking of an induction motor up to that current without welding the main contacts. Screw-type terminals on both the main poles and the magnet coil, with a screw and snap-on mount onto 35 mm DIN rail per DIN EN 60715.
What the Ratings Mean for Your Panel
AC-3 at 480 V is the number that decides whether this contactor lives in your motor starter. It carries 52 A continuously and breaks the same current during a stop. The auxiliary switch is built in (18 to 1 normally open/normally closed configuration), so you don't need a separate add-on block for basic status feedback to a PLC or indicator light. Mechanical life is typical 10 million operations — that's the contactor body itself, not the contacts under load. The AC-3 electrical life at maximum rate is 800 operations per hour, which is fine for a conveyor or pump cycling at moderate speed; for high-speed jogging you'd derate. Mounting position is flexible: +/-180° rotation on a vertical surface, and can be tilted forward/backward by +/-22.5°. That gives you options in a crowded panel. Clearances: 10 mm upwards and forwards, 10 mm downwards, 6 mm at the sides. The 55 mm width and 114 mm height fit the standard S2 footprint — same as other SIRIUS S2 contactors, so a panel laid out for a 3RT2028 or 3RT2037 will accept this one without re-drilling the DIN rail.