The Siemens SIRIUS 3RT1054-6NB36 is a size S6 power contactor designed for switching motor loads and resistive circuits in industrial control panels. The coil is rated for 21 to 27.3 VDC, with screw-type terminals for the magnet coil connection. Rated for AC-3 duty at up to 1,000 operating cycles per hour. AC-1 resistive load switching frequency is 800 ops/h; AC-4 is limited to 130 ops/h. The auxiliary contact block is included and rated at 10 A at 24 V, 2 A at 48 V or 60 V, and 1 A at 110 V — sufficient for signaling to a PLC or control relay.
Mounting and Wiring
Fastened via screw fixing through a single 9 mm hole. The mounting position allows a vertical mounting surface with ±90° rotation and ±22.5° tilt front-to-back, giving panel builders flexibility in tight enclosures. Main circuit wiring accepts stranded conductors from 25 to 120 mm². The auxiliary circuit terminals accept 2x (0.5 to 1.5 mm²) solid, 2x (0.75 to 2.5 mm²) solid, or up to 2x (0.75 to 4 mm²) stranded — covering standard control wiring sizes. Clearance distances: 10 mm upwards, 20 mm forwards, 10 mm downwards, 10 mm at the side. Operating temperature range is -25 to +60 °C; storage range extends from -55 to +80 °C.
Switching Performance and Lifecycle
Mechanical endurance rated at 10,000,000 operating cycles typical. Arcing time is 10 to 15 ms; operating times (AC and DC) are 80 to 90 ms. The power factor at 50 Hz and 60 Hz is 0.6, which influences the sizing of power-factor correction capacitors if used on the same bus.
Sourcing and Compliance
As a Siemens SIRIUS component, the 3RT1054-6NB36 is manufactured under IEC/EN 60947-4-1 standards for contactors and motor starters. Compliance documentation — including declarations of conformity for the Low Voltage Directive and applicable harmonized standards — is available upon request.