The Siemens 3RH1344-2GG20 is a size S00 contactor relay from the SIRIUS family, wired with 6 normally-open and 2 normally-closed contacts. The coil is rated for 110 V AC at 50/60 Hz, and the full rectifier is integrated into the unit — no external bridge needed for DC operation of the coil. Cage clamp terminals accept solid or ferruled stranded conductors without retightening, which speeds panel wiring and reduces connection drift under vibration.
Integration notes
The S00 frame size snaps onto a 35 mm DIN rail per EN 60715, with a 45 mm width that leaves room for adjacent auxiliary contact blocks or overload relays in a motor starter stack. Cage clamp terminals accept 0.5–2.5 mm² conductors; strip length is 10 mm. The integrated full rectifier means the coil draws DC after the initial AC pick-up — verify the control transformer sizing if multiple relays pick up simultaneously.