The Siemens 3RT2038-3AV00 is a SIRIUS power contactor in Size S2, rated for 65 A at 480 V and 400 V at 50 Hz — the sort of AC-3 motor-switching work you see on conveyors, pumps, and compressors in a 480 V plant.
The 65 A at 480 V figure is the AC-1 resistive-load rating — that's the thermal continuous current the contactor can carry without derating. The spring-type terminals accept 2x (0.5 to 2.5 mm²) solid or stranded wire — no ring lugs needed, which speeds up panel wiring. The arcing time runs 10 to 20 ms, and the make/break time at AC is 10 to 18 ms, so it's in the normal range for a contactor this size.
DIN-rail integration and clearances
The 3RT2038-3AV00 measures 55 mm wide by 114 mm high by 130 mm deep. That 6 mm side gap is tighter than some contactors — check it against adjacent devices, especially if you're packing multiple contactors side by side.
