The Siemens 3RF3310-1BA22 is a 1-pole solid-state contactor from the SIRIUS 3RF33 family, rated for AC-15 duty at 6 A at 40 °C. AC-15 is the switching category for electromagnetic loads — solenoids, contactor coils, and clutches — where the inrush current can be several times the holding current. The 6 A rating under AC-15 means this contactor is sized to switch and sustain loads like multiple small contactor coils or a bank of solenoid valves in a control panel, not resistive heater loads.
Control voltage and switching
The control circuit accepts a wide range: 24-230 V AC / 110-230 V AC, with instantaneous switching — no zero-cross or soft-start delay built in. The screw terminals are standard for panel wiring; expect to land 0.5–2.5 mm² stranded or solid conductors. Snaps onto a DIN rail, so it integrates directly into a standard enclosure alongside other SIRIUS modular components.