The 3RF3380-1BA04 is a 1-pole solid-state contactor from the Siemens SIRIUS 3RF33 family, rated for AC-15 duty at 27.5 A at 40 °C. AC-15 is the switching category for electromagnetic loads — solenoids, contactor coils, clutches — where the inrush can be several times the holding current. The 27.5 A figure at 40 °C means this contactor handles that load current without derating at typical panel ambient; if your enclosure runs hotter, you'll need to reduce the load or add ventilation. The switching voltage range is 48-460 V AC, and the control side takes a 24 V DC signal for instantaneous on/off. Termination is via screw terminals, which suits panel builders who prefer a fixed connection over spring-cage.
Integration notes
The screw terminals accept the load and control wiring; no special tooling needed. The 24 V DC coil is polarity-sensitive on some solid-state contactors, so verify the control wiring orientation before powering up. The instantaneous switching means no ramp or soft-start — it's either fully on or fully off, which is fine for coil and solenoid loads but not for inrush-limited applications like transformers.