Siemens SIRIUS 3RT2018-2XF41-0LA2 — DC-Coil Power Contactor, Size S00
Its DC coil is rated for 72 to 125 VDC, with a pickup threshold of 0.7 times the rated value and dropout timing of 25 to 45 ms. The coil termination uses spring-type terminals, which eliminate the need for periodic re-torquing common with screw clamps. The envelope dimensions — 45 mm wide, 70 mm high, 73 mm deep — fit standard panel layouts.
Main Contact Ratings and Switching Capacity
The main contacts are rated for AC-4 duty at 20 to 12 A depending on the operating conditions, with a maximum switching frequency of 250 operations per hour at AC-4. For DC switching, the contactor is rated at 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, and 0.2 A at 440 V. At 480 V AC, the rating is 14 A. The auxiliary contact ratings follow the same DC voltage table as the main contacts.
This flexibility simplifies panel layout when space is constrained. Solid conductors accepted: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and 2x 4 mm². The spring-type coil terminals accept the same ranges, reducing wiring time compared to screw terminals.