The Siemens 3RF3380-1BA22 is a 1-pole solid-state contactor from the SIRIUS 3RF33 family, rated for AC-15 duty at 27.5 A at 40 °C. It switches loads between 110-230 V AC and accepts a control voltage of 24-230 V AC, with instantaneous switching and screw terminals for wiring. As a solid-state contactor, it provides silent, wear-free switching for resistive and lightly inductive AC loads — common in heating elements, lighting banks, and solenoid valve banks where mechanical contactor noise and coil wear are concerns. The 1-pole configuration handles single-phase loads or one phase of a three-phase circuit.
The screw terminals accept standard power and control wiring, and the contactor snaps onto a DIN rail for panel mounting. The 105 x 73 x 128 mm package fits alongside other SIRIUS control gear in a standard distribution or motor control center enclosure.