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SIRIUS 3RT power contactors, sizes S6 to S12

Siemens SIRIUS 3RT power contactors, sizes S6 to S12

The large sizes of the 3RT1 range: 3-pole power contactors from 55 to 250 kW at 400 V.

Sizes S6, S10 and S12 cover 115 to 500 A at AC-3. From S6 upwards the contactors work with either a conventional or an electronic operating mechanism, the latter with a PLC-compatible control input. Depending on the version the main circuit is connected via box terminal or busbar, the control and auxiliary circuit via screw or spring-loaded terminals.

Parent category: Siemens SIRIUS 3RT contactors.

Product benefits

  • Proven SIRIUS 3RT range from Siemens – available worldwide and maintained over decades
  • Consistent modular system: auxiliary switches, surge suppressors and link modules fit across sizes
  • Screw or spring-loaded terminals – spring-loaded saves assembly time and is vibration-proof
  • Versions with electronic operating mechanism reduce holding power and work over a wide voltage range
  • Approvals to IEC and UL/CSA, so the same plant can be operated in Europe and North America
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