The Siemens 3RK1300-0CS01-0AA3 is an EM 300 DS electromechanical direct starter designed for the ET 200X distributed I/O system. It's a self-contained motor starting unit with a bimetal overload relay, setting range 0.18-0.25 A, rated for AC-3 duty at 0.06 kW / 400 V. The IP65 enclosure means it's washdown-rated for direct machine-mounting on conveyors, packaging lines, or material handling equipment — no separate panel enclosure needed.
The 0.18-0.25 A setting range and 0.06 kW AC-3 rating at 400 V limit this starter to fractional-horsepower motors — think small gearmotors, vibratory feeders, or valve actuators. The 134 mm depth and 140 mm width fit the ET 200X footprint; it's not a standalone DIN-rail device — it mounts directly on the ET 200X power interface module.