The Siemens 3RF3310-1AA12 is a 1-pole SIRIUS 3RF33 solid-state contactor rated for AC-1 resistive loads at 10 A and 40 °C ambient. Its control voltage spans 24-230 V AC/DC, making it a drop-in fit for panels with mixed control supplies. The screw terminals match standard wiring practices — strip to 8 mm and torque to the terminal rating.
What the AC-1 rating means for your load
The AC-1 rating of 10 A at 40 °C covers resistive loads like heaters and incandescent lighting. If you're switching motor loads or inductive coils, you'll need to derate — the AC-3 (motor) rating on this single-pole contactor will be lower. For a 3-phase motor, you'd need three units or a 3-pole variant. The 24-230 V AC/DC control input simplifies wiring across different control voltage zones in the same panel.