The Siemens SIRIUS 3RT2017-2AB01-ZX95 is a Size S00 power contactor — the smallest frame in the SIRIUS family, built for switching motor loads and resistive circuits in control panels up to about 7.5 kW at 400 V. The spring-type terminals on the magnet coil accept solid or stranded wire from 0.5 to 4 mm², and the 45 mm width with 73 mm depth means it slots into tight DIN channels without hogging space.
Ratings that matter for the panel builder
Electrical endurance depends on load: at AC-3 (motor starting) it is rated for 750 switching cycles per hour maximum, while AC-4 (inching/plugging) drops to 250 1/h. The arcing time of 10 to 15 ms and AC switching time of 7 to 13 ms are short enough that a PLC cycle time of 10 ms will not miss a dropout.
