The Siemens 3RT1017-2BP41 is a SIRIUS-branded power contactor in frame size S00, rated for switching three-phase motor loads up to 5.5 kW at 400 V under AC-3 duty. Main circuit connections use spring-loaded terminals accepting 2x (0.25 to 2.5 mm²) solid or stranded copper, which speeds wiring and holds under vibration better than screw terminals.
Rated for AC-3 motor switching at 5.5 kW on 400 V three-phase, this contactor handles the inductive inrush of standard squirrel-cage motors up to that power — the rating that governs real motor starts, not the resistive AC-1 figure. For reversing or plugging duty (AC-4), it carries 8.5 A at 400 V, so expect reduced service life if used for frequent inching or jogging of a motor near its full AC-3 rating. Motor power ratings extend to 5.5 kW at both 500 V and 690 V, making it suitable for 690 V line supplies common in wind turbine nacelles or mining installations. Coil hold power is a constant 3.3 W DC, so the thermal load on the panel stays low even under continuous energization.
Environmental and installation limits
Front face is IP20, meaning finger-safe when installed in a closed panel; the terminals themselves are also IP20, so no additional shrouding is required for basic touch protection.