24 V AC coil, Size S00, 2 NO + 2 NC
The 3RH2122-1AB00-1AA0: The 2 NO + 2 NC contact arrangement gives you a balanced set for interlocking or auxiliary switching in a motor starter or control circuit.
Screw terminal, upright mounting
Termination is via screw terminals, and the relay is designed for upright mounting position. The Size S00 form factor fits standard DIN-rail or panel-mount layouts used across Siemens SIRIUS control gear.