SIRIUS Size S6 Power Contactor — 3RT1056-7AB36-0SF1
The Siemens SIRIUS 3RT1056-7AB36-0SF1 is a Size S6 power contactor designed for switching motor loads in industrial control panels. It is screw-fixed to the mounting surface, with a vertical mounting surface that allows +/-90° rotation and +/-22.5° tilt front-to-back, giving panel builders flexibility in orientation. The coil is rated 23-26 V and terminates via spring-type terminals, while the main power circuit accepts stranded conductors from 16 to 70 mm². Auxiliary/control wiring uses solid or stranded 2x (0.25-2.5 mm²) conductors. Mechanical endurance is rated at 10,000,000 operating cycles typical, with switching frequencies varying by duty: 800 cycles/hour at AC-1, 750 at AC-3 and AC-3e, 300 at AC-2, and 130 at AC-4. Arcing time runs 10-15 ms; operate times are 40-60 ms for both AC and DC coils.
Dimensions and Clearances for Panel Integration
The contactor measures 172 mm high, 120 mm wide, and 170 mm deep. Required clearances for ventilation and arc containment: 10 mm upwards, 10 mm downwards, 10 mm at the side, and 20 mm forwards. Operating temperature range is -25 to +60 °C; storage range extends from -55 to +80 °C. The auxiliary switch is included as standard.
Auxiliary Contact Ratings
The auxiliary contacts are rated for 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, and 0.3 A at 220 V — covering typical control circuit voltages.