The Siemens 3RF3320-1BA24 is a 1-pole solid-state contactor from the SIRIUS 3RF33 family, rated for AC-15 duty at 12 A at 40 °C. It switches loads in the 48-460 V range with a 110-230 V AC control supply, using instantaneous switching and screw terminals.
The AC-15 rating at 12 A means this contactor is sized for electromagnetic loads — solenoids, clutches, brake coils — where the inrush can exceed the holding current. At 40 °C ambient, it handles 12 A continuous; derate above that. The 48-460 V load voltage range covers common three-phase line-to-line supplies (208 V, 400 V, 460 V) on single-pole switching. The 110-230 V AC control voltage is a standard coil supply for panel circuits. Instantaneous switching means no zero-cross delay — it fires the load immediately on control signal, which matters for fast-acting circuits but can cause higher inrush stress on the load.
The screw terminals accept standard control wiring — no special tooling needed. Its 1-pole form factor saves rail space compared to a 3-pole electromechanical contactor when only one pole is needed.
Compliance documentation
RoHS compliant since 15-01-24. Export control: AL N / ECCN 9N9999.