What this SIRIUS direct starter carries
The Siemens 3RK1395-6LS41-2AD3 is a SIRIUS direct motor starter in an IP65 enclosure, rated 5.5 kW at 400 V AC and 12 A, with a HAN Q4/2 power connector per ISO 23570 for quick panel hookup. It runs on a 20.4 to 28.8 V DC control supply and offers selectable trip classes 5, 10, 15, and 20, so you match the thermal curve to the motor start profile — fast for low-inertia loads, slower for high-inertia fans or conveyors. Onboard I/O includes 4 digital inputs and 2 digital outputs, enough for basic start/stop and feedback without a separate block.
Mounts via screw fixing in vertical, horizontal, or flat orientation — the recommended position is horizontal for best thermal convection. Dimensions are 294 mm wide by 215 mm high by 148 mm deep; plan the gland plate and door clearance around that depth. Rated IP65, so it handles washdown environments and dusty panels without an extra enclosure.
Operates from -25 to +55 °C, stores and ships from -40 to +70 °C — fine for unheated warehouses and refrigerated lines. Shock rated 12g at 11 ms, vibration 7 mm at 2g; pollution degree 3 means it's built for conductive-dust industrial floors.