The Siemens 3RF3380-3AA06 is a 1-pole SIRIUS 3RF33 solid-state contactor rated 80 A in AC-1 duty at 40 °C, meaning it handles resistive heating or lighting loads up to that current without derating. Ring cable lug connection means the power terminals accept ring terminals — common in panel builds where vibration resistance matters. No screw-clamp torque worries; just crimp and bolt. This part lives in the SIRIUS 3RF33 family, Siemens' modular solid-state contactor range for zero-wear switching in cyclic or continuous-duty applications.
Where it's used and deployment context
Solid-state contactors of this class replace electromechanical contactors in applications where switching frequency is high (plastics machinery, packaging lines, HVAC duct heaters) or where silent operation and no contact bounce are required. The 80 A AC-1 rating fits resistive loads like infrared heaters, ovens, or lighting banks. No moving contacts means no arc wear, so maintenance intervals stretch compared to a mechanical contactor on the same duty. The 24 V DC control side is low-power enough to be driven by a standard 24 V industrial supply or a digital output card. No AC coil hum, no inrush spike on the control transformer. Mounts on standard DIN rail in the enclosure; the ring-lug terminals suit pre-crimped cable assemblies for fast swap-out on a line-down call.