What This Part Is and Where It Fits
The Siemens SIRIUS 3RT2017-2KG42-0LA0 is a size S00 contactor with a DC-operated coil and spring-type terminals for the coil connection. It's designed for switching motor loads and resistive loads in control panels, mounting via screw or snap-on onto a 35 mm standard mounting rail per DIN EN 60715. The DC coil is rated for 125 V with a pickup time of 7 to 20 ms and an arcing time of 10 to 15 ms. At 24 V DC, the main contacts are rated for 10 A; at 230 V, the contactor is rated for 2 hp. This makes it suitable for smaller motor control applications where a DC control voltage is already available in the panel.
Dimensions, Wiring, and Clearances
The contactor measures 45 mm wide, 70 mm high, and 121 mm deep. That 121 mm depth is the dimension to watch when fitting into shallow enclosures or when back-panel clearance is tight. Spring-type terminals on the coil accept solid conductors from 0.5 to 1.5 mm² (two per terminal), stranded from 0.75 to 2.5 mm² (two per terminal), or a single 4 mm² conductor. The main contact terminals accept 2x (0.5 to 4 mm²) solid or stranded. Minimum clearance distances are 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side. Mounting position is flexible: the contactor can be rotated ±180° on a vertical surface and tilted forward or backward by ±22.5°. Operating temperature range is -40 to +70 °C; storage range is -55 to +80 °C.
DC Switching Ratings Across Voltages
The main contact DC switching capacity varies significantly with voltage, which is typical for DC load interruption. Key ratings: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, 11 A at 480 V, 2 A at 500 V, 11 A at 600 V, and 1 A at 690 V. The higher currents at 480 V and 600 V suggest these are likely AC ratings or a different duty cycle — verify against your specific load type and voltage. The contactor includes an auxiliary switch and has a typical mechanical life of 30,000,000 operations. Maximum switching frequency under AC-4 duty is 250 operations per hour.