The Siemens 3RT1054-3NF36 is a SIRIUS power contactor in the Size S6 frame, designed for switching motor loads and resistive loads in industrial control panels. It carries a 96-127 V AC/DC coil with spring-type terminals on the magnet coil, and the main power terminals accept stranded conductors from 16 to 70 mm². The contactor is rated for AC-3 switching at up to 1,000 operating cycles per hour, which covers the typical duty cycle for motor starting on conveyors, pumps, and fans. The AC-4 rating of 130 ops/h governs plugging and inching applications where the contactor makes and breaks stalled-rotor current. Mounting is via screw fixing to a vertical surface, with the contactor rotatable ±90° and tiltable ±22.5° front-to-back. The operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C.
Lifecycle and Sourcing
The 3RT1054-3NF36 is listed as a current-production item. It is sourced to order through independent distribution; availability and current pricing are confirmed at quote time against an RFQ. No official successor has been declared for this order code. If a panel was specified around the 3RT1055-6QF35, note that the 3RT1054-3NF36 shares the same Size S6 frame and screw-fixing pattern, so mechanical fit in the same panel footprint is expected. Verify the coil voltage and auxiliary contact configuration against your BOM before committing.
Termination and Wiring
The coil terminals are spring-type, accepting solid or stranded conductors from 0.25 to 2.5 mm², with a dual-conductor capacity of 2x (0.25 to 2.5 mm²). The auxiliary switch is present as a built-in feature. Its rated switching capacity at 24 V is 10 A, at 48 V and 60 V it is 2 A, at 110 V it is 1 A, at 125 V it is 0.9 A, and at 220 V it is 0.3 A.
Clearance and Timing
Minimum clearances to adjacent components: 10 mm upwards, 10 mm downwards, 10 mm at the side, and 20 mm forwards. Arcing time is 10-15 ms. Closing time is 80-90 ms for both AC and DC coil supplies. The contactor's mechanical life is typically 10,000,000 operating cycles.