The Siemens 3RT1317-2AM20 is a SIRIUS power contactor in the compact Size S00 frame — 45 mm wide, 60 mm tall, 72 mm deep — built for switching motor loads and resistive circuits in industrial control panels. It carries 4 normally-open main contacts and lands at 5.5 kW rated power in AC-2 duty at 400 V, which covers wound-rotor motor starting and moderate switching frequencies on a standard three-phase line. The main circuit connects through spring-loaded terminals accepting 2x (0.25 to 2.5 mm²) solid or stranded, or 2x (24 to 14 AWG).
Ratings that govern the real load
Coil draw at 24 V is 10 A inrush, dropping to a holding current that stays within the standard PLC output card range. At 230 V the coil draw is 6 A; at 400 V it's 3 A. IP20 on the front and at the terminals means finger-safe but not washdown-rated — install inside a sealed enclosure if the panel sees hose-down cleaning.