The Siemens 3RT1056-6AP36-3PA0 is a SIRIUS-brand power contactor in the Size S6 frame, with a 220-240 V AC coil terminated through screw-type terminals and an integrated auxiliary switch. It is designed for motor switching in industrial control panels, rated for AC-3 duty cycles up to 750 operations per hour.
The Size S6 frame measures 172 mm high by 120 mm wide by 170 mm deep, with screw fixing through a single 9 mm hole. Mounting position allows vertical surface rotation ±90° and tilting ±22.5° front-to-back, giving panel-builders flexibility in tight enclosures. Power-circuit wiring accepts stranded conductors from 25 to 120 mm². The auxiliary and coil terminals handle solid or stranded wire: 2x 0.5 to 1.5 mm², 2x 0.75 to 2.5 mm², or max 2x 0.75 to 4 mm².
Duty cycles and switching performance
Maximum switching frequency varies by duty: 800 operations/hour at AC-1 (resistive), 750/h at AC-3 (standard motor starting), 300/h at AC-2, and 130/h at AC-4 (plugging/inching).
Environmental and auxiliary ratings
The auxiliary switch contacts are rated: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, and 1 A at 110 V.