The Siemens 3RF3320-1BA02 is a 1-pole solid-state contactor from the SIRIUS 3RF33 series, rated for AC-15 duty at 12 A and 40 °C. That AC-15 rating means it's designed for switching electromagnetic loads — solenoids, contactor coils, clutches — where the inrush current can be several times the holding current. Control voltage is flexible: 24-230 V AC or 24 V DC, with instantaneous switching — no zero-crossing delay, so it fires on command without waiting for the AC waveform. The screw terminal connection suits panel builders who prefer a fixed wiring method over spring-cage.
Export control is straightforward: AL: N / ECCN: 9N9999, meaning no special license required for most destinations. RoHS compliance dates from January 2024, and REACH Article 33 disclosure notes lead (CAS 7439-92-1) above 0.1% w/w — standard for electronic components with solder joints.
Integration notes
The packaging dimensions of 105 x 27 x 122 mm give you the envelope for panel layout — it's a slim 27 mm wide, so it fits in tight rows alongside other SIRIUS 3RF3 contactors or SIRIUS control gear. No special clearance needed for heat sinking at the 12 A AC-15 rating, but if you're running it near the limit in a sealed enclosure, allow natural convection around the body.