Part identification and key ratings
The Siemens 3RF3380-3AA24 is a 1-pole solid-state contactor from the SIRIUS 3RF33 family, rated for AC-1 resistive loads at 80 A at 40 °C. The control supply accepts 110-230 V AC, and the main circuit handles 48-460 V AC. Connection is via ring cable lugs.
What the AC-1 rating means for fit
The AC-1 rating of 80 A at 40 °C defines the continuous resistive load the contactor can switch — typically heaters, lamps, or resistive banks. The 48-460 V AC main circuit voltage covers standard three-phase and single-phase line voltages across global installations.
The ring cable lug connection suits fixed wiring in industrial cabinets where vibration resistance is needed. The 1-pole configuration is typical for single-phase resistive loads or for switching one phase in a three-phase circuit where the other phases are handled by separate contactors.