The Siemens SIRIUS 3RH2344-1CN20-0KA1 is a size S00 auxiliary contactor with a 4 NO + 1 NC contact configuration, rated 10 A at 24 V. The 117 mm depth and 57.5 mm height fit within the S00 envelope, leaving clearance for wiring ducts and adjacent devices.
These spacings keep the arc chamber vented and prevent heat buildup between adjacent devices.
Contact ratings and switching performance
The contactor carries a leading contact (1) and a lagging switching contact (1), plus three instantaneous contacts — typical for a 4 NO + 1 NC auxiliary block where the NC mirrors the NO state. Rated current at 24 V is 10 A; at 60 V it drops to 4.7 A, at 110 V to 3 A, at 230 V to 6 A, at 400 V to 3 A, at 440 V to 0.5 A, at 500 V to 2 A, at 600 V to 0.26 A, and at 690 V to 1 A.