The Siemens 3RH2344-1DG40 is a SIRIUS auxiliary contactor in size S00, carrying four normally-open instantaneous contacts. It mounts via screw and snap-on onto a 35 mm standard mounting rail, with a width of 45 mm, depth of 117 mm, and height of 57.5 mm. The mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward and backward.
Switching capacity and contact ratings
The 4 NO contacts are rated for DC switching at 125 V with an initial value of 0.8 and full-scale value of 1.1. AC switching capacity reaches 10,000 operations per hour, with an arcing time of 10 to 15 ms and DC switching duration of 7 to 13 ms. Rated currents vary by voltage: 10 A at 24 V, 4.7 A at 60 V, 3 A at 110 V, 1.2 A at 220 V, 6 A at 230 V, 3 A at 400 V, 0.5 A at 440 V, 2 A at 500 V, 0.26 A at 600 V, and 1 A at 690 V. Typical mechanical life is 10 million operations.
Environmental and compliance
Operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C. Pollution degree 3 rating means it tolerates conductive pollution typical in industrial control panels. Relative humidity minimum is 10%. The contactor includes a built-in varistor surge suppressor. It complies with RoHS substance prohibitions effective July 1, 2006.