What this reversing starter does differently
The 3RK1325-6KS41-1AA3 is a SIRIUS reversing starter that packs forward/reverse motor control, overload protection, and four digital inputs into a single IP65 enclosure — no separate contactor pair needed for reversing duty. Rated 0.75 kW at 400 V (0.7 hp at 460/480 V, 1 hp at 575/600 V), it covers the typical small conveyor, pump, or actuator reversing job. Supply voltage is 24 V DC nominal (20.4…28.8 V range, max 31.6 V), so it drops straight onto a standard industrial 24 V bus without a separate power supply module.
Panel fit and mounting constraints
Footprint is 159 mm deep by 294 mm wide by 215 mm tall — allow clearance for the M12 plug on device addressing and the HAN Q4/2 main-circuit connector. Screw fixing to the backplate; mounting position can be vertical, horizontal, or flat. IP65 rating means the housing is dust-tight and splash-proof — suitable for on-machine or floor-level mounting where washdown or debris is present, but not for submersion. Ambient operating range is -25 to +55 °C; storage and transport tolerance -40 to +70 °C. Shock rated 12g / 11 ms, vibration 7 mm / 2g — handles the typical conveyor or machine-tool environment.
Trip class and protection coordination
Trip class is selectable between 5, 10, 15, and 20 — match the thermal overload response to the motor's start-up profile. Class 10 is the default for standard induction motors; Class 20 buys extra time for high-inertia loads like fans or centrifuges. The starter supports reverse starting directly, so the reversing contactor pair is internal — no external reversing contactor or interlock wiring required. ON-delay is 85 ms, OFF-delay 65 ms — fast enough for most sequencing but not for safety-rated instant-off; plan your logic scan cycle accordingly.