The Siemens 3RK1322-0HS02-0AA3 is an AS-i compact direct starter — a self-contained motor starting and protection unit in an IP65 enclosure, rated for 0.55 to 0.8 A with a motor power of 0.21 kW at 400 V AC-3 duty. It uses a bimetal overload relay for motor protection and integrates a brake contact output, making it suited for conveyors or small drives that need a controlled stop.
The 0.55 to 0.8 A setting range and 0.21 kW AC-3 rating define the motor it can start and protect — small three-phase motors up to that power at 400 V. Communication is via AS-interface, not PROFIBUS DP, so verify your fieldbus architecture before specifying — this unit talks on the AS-i yellow cable, not a DP drop.
Integration notes
The enclosure measures 270 mm high, 120 mm wide, and 190 mm deep — panel-mount footprint is substantial; verify gland plate clearance for the 9-pole motor outgoing feeder and 9-pole power connection. Main circuit connections use tab terminals, so mating connectors need to match that form factor. The unit includes two integrated inputs for local sensors or pushbuttons, reducing external wiring.