The Siemens 3RT2038-1AL20-ZX95 is a SIRIUS power contactor in size S2, rated to switch motor loads up to 65 A at 480 V or 15 hp at 230 V. An integrated auxiliary switch is included, so you don't need a separate add-on for feedback or interlocking.
The 65 A at 480 V rating tells you this contactor handles a 480 V motor load up to that current in AC-3 duty — typical for squirrel-cage induction motors on conveyors, pumps, or fans. The 15 hp at 230 V covers single-phase or lower-voltage three-phase motors. That covers most indoor panel environments; if your enclosure sees sustained heat near 60 °C, derate per the thermal curve.
Integration into the panel
Dimensions: depth 130 mm, width 55 mm, height 114 mm. Wire range accepts 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded.