Siemens 3RT2017-1AN21 SIRIUS Power Contactor – Size S00, 24 VDC Coil
The Siemens 3RT2017-1AN21 is a SIRIUS power contactor in size S00, designed for switching motor loads in control panels. It mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715, and the mounting position allows +/-180° rotation on a vertical surface plus +/-22.5° tilt forward/backward, giving panel builders flexibility in tight enclosures. Rated for AC-3 duty at 750 switching cycles per hour maximum, this contactor handles the repetitive start/stop of squirrel-cage motors typical in conveyor, pump, and fan applications. The AC-1 resistive load rating allows up to 1000 cycles per hour for heating or lighting loads. The coil draws 0.25 A at both 50 Hz and 60 Hz, so line frequency variation does not affect pull-in performance. The screw-type terminals accept solid or stranded wire from 0.5 to 4 mm², with dual-wire capability for daisy-chaining auxiliary circuits.
Integration and Mounting
At 45 mm wide, 58 mm tall, and 73 mm deep, the S00 frame fits standard DIN-rail spacing. Clearance requirements: 10 mm upward and forward, 10 mm downward, and 6 mm at the side — critical when grouping multiple contactors in a row. Operating temperature range is -25 to +60 °C; storage range extends from -55 to +80 °C. The auxiliary switch is included, with ratings from 10 A at 24 V down to 0.2 A at 440 V — verify the control voltage for your specific signal circuit. Arcing time is 10 to 15 ms at AC, and the main contacts are sized for wire cross-sections from 20 to 12 AWG (0.5 to 4 mm²). Mechanical life is typical 30 million operations.