What it is and where it fits
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. It mounts on a 35 mm DIN rail per DIN EN 60715, with screw-type terminals on the magnet coil and main contacts. An integrated auxiliary switch is included, so you don't need a separate add-on for feedback or interlocking.
Key ratings and what they mean for the panel
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. Mechanical life is rated at 10,000,000 operations typical, so it's built for high-cycle applications like packaging or material handling. Operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C. That covers most indoor panel environments; if your enclosure sees sustained heat near 60 °C, derate per the thermal curve. Mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward, giving flexibility in tight cabinets.
Integration into the panel
Fastens with screw or snap-on onto 35 mm DIN rail. Dimensions: depth 130 mm, width 55 mm, height 114 mm. Clearance: 10 mm upwards, 10 mm forwards, 10 mm downwards, 6 mm at the side. That 130 mm depth means it fits standard 200 mm deep enclosures with room for wiring behind. Wire range accepts 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded.