What this reversing starter does
The Siemens 3RA1210-0KA15-0AV6 is a reversing starter in the SIRIUS S00 frame, rated for 480 VAC at 0.9 A. It combines two contactors with a mechanical interlock to reverse a three-phase motor's direction — a common requirement on conveyors, mixers, and valve actuators that must run forward and back under control. The S00 frame size means it occupies the smallest Siemens reversing-starter footprint, fitting the same DIN-rail or panel-mount pattern as the rest of the SIRIUS family.
The 480 VAC rating governs the coil and main power circuit. The 0.9 A rating is the motor full-load current it can switch in reversing duty.