What it is and where it fits
The Siemens 3RT2017-2AP01-1AA0 is a SIRIUS power contactor in the Size S00 frame, designed for switching motor loads and resistive loads in control panels. It mounts via screw or snap-on onto a 35 mm DIN rail per DIN EN 60715, standing on a horizontal mounting surface. At 73 mm deep, 70 mm tall, and 45 mm wide, it fits standard 45 mm-wide contactor slots in distribution boards and motor control centers. The spring-type terminals on the magnet coil eliminate the need for screwdriver torque checks during installation.
Key ratings and what they mean for the buyer
The contactor accepts solid or stranded conductors from 0.5 to 4 mm², and up to 2x (0.5 to 4 mm²) per clamp — enough for daisy-chaining control wiring without additional terminal blocks. The auxiliary switch is built in, rated for 10 A at 24 V, 2 A at 48 V, and derating to 0.2 A at 440 V; these are the values that govern whether the auxiliary contacts can handle the pilot duty or PLC input load in your circuit. Switching frequency limits are specified per duty class: 1000 cycles/hour at AC-1 (resistive), 750 at AC-2 and AC-3 (motor starting/running), and 250 at AC-4 (plugging/inching). For a conveyor or pump running continuous AC-3 duty, the 750 c/h ceiling is the real constraint — not the higher AC-1 figure. The mechanical service life is 30 million operations typical, so the contactor outlasts most panel rebuild cycles. Operating temperature range is -25 to +60 °C, storage -55 to +80 °C. Clearance distances: 10 mm upwards, forwards, and downwards; 6 mm at the side. Operating time at AC is 4 to 15 ms, arcing time 10 to 15 ms — useful for coordination with upstream short-circuit protection.