The Siemens 3RK1395-6KS41-2AD5 is a SIRIUS direct motor starter, rated 0.75 kW at 400 V and 2 A at 400 V AC. It's a self-contained unit with 4 digital inputs and 2 digital outputs, housed in an IP65 enclosure — meaning it can sit right on the machine frame, not just in a clean panel. Supply is 24 V DC (20.4...28.8 V).
Trip class and motor protection
This starter offers selectable trip classes 5, 10, 15, and 20. That range covers fast-protection for submersible pumps (class 5) up to high-inertia loads like centrifuges (class 20). You set it to match the motor's thermal damage curve — not a one-size-fits-all overload relay.
Mounting is screw fixing; the unit can go vertical, horizontal, or flat. Recommended orientation is horizontal for best heat dissipation. Dimensions are 294 mm wide, 215 mm high, 148 mm deep — that's a sizable footprint, so check your gland plate and DIN-rail space before committing.