Siemens 3RH2122-1AU60 is a four‑pole contactor relay from the 3RH2 family, configured with two normally open and two normally closed contacts for versatile control in industrial circuits. It uses a 277 V AC coil at 60 Hz and comes in frame size S00 with screw terminals and upright mounting, with main contacts rated for up to 690 V AC and a maximum load current of 10 A. Designed for AC operation, this compact Siemens contactor is well suited to starting and stopping motors and interlocking sequences in automation panels, and can be augmented with additional auxiliary contact blocks if more signaling contacts are required.
