The Siemens SIRIUS 3RT2038-1CL24-3MA0 is a Size S2 power contactor rated for 65 A at 480 V in AC-3 duty — that's the motor-switching rating, so it handles a 3-phase motor load up to that current without welding the contacts on inrush. Mechanical life is typical 10,000,000 operations, and it's rated for 500 cycles per hour at AC-3, so it's built for continuous cycling in a machine or conveyor line.
The 65 A AC-3 rating at 480 V is the number that decides whether this contactor handles your motor load — AC-3 covers starting and plugging of squirrel-cage motors, where the inrush is several times full-load current. If your motor FLA is under 65 A at 480 V, this contactor fits. At 55 mm wide, 114 mm tall, and 174 mm deep, it fits a standard Size S2 footprint on the DIN rail — check your enclosure depth against the 174 mm dimension before committing the panel layout.