SIRIUS S2 power contactor — 3RT2038-1AP64
The Siemens 3RT2038-1AP64 is a SIRIUS S2 power contactor designed for switching motor loads and resistive loads in industrial control panels. It carries a 65 A rating at 480 V, making it suitable for medium-horsepower motors and high-current heater banks. The contactor mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715, with a footprint of 55 mm wide by 114 mm tall by 174 mm deep. The mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, giving panel builders flexibility in tight enclosures. Operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C. The coil connection uses screw-type terminals; main contact wiring accepts 2x (0.5…1.5 mm²) or 2x (0.75…2.5 mm²) solid or stranded conductors.
Switching performance and mechanical life
Rated for 10 million mechanical operations typical. Maximum switching frequency varies by duty: 700 cycles/hour at AC-1 (resistive), 500 at AC-3 (motor start/run), and 150 at AC-4 (plugging/inching). Arcing time spans 10…20 ms; closing time 10…18 ms at AC. Auxiliary contact block not included — the 3RT2038-1AP64 ships with main contacts only (18…1 configuration). Add a separate SIRIUS auxiliary switch block if feedback or interlocking is needed.