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.
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.