SIRIUS 3RT1056-6XF46-0LA2 — Power Contactor, 110 V DC Coil, Size S6
The Siemens 3RT1056-6XF46-0LA2 is a SIRIUS power contactor in frame size S6, with a 110 V DC coil and an auxiliary switch.
Duty Ratings and Switching Frequency
This contactor is rated for multiple duty classes, each with a maximum switching frequency. In AC-1 (resistive) duty it can handle up to 800 operations per hour; in AC-3 (squirrel-cage motor starting) it's rated at 750 operations per hour; in the tougher AC-4 (plugging/reversing/inching) duty it drops to 130 operations per hour. For DC switching, DC-1 allows 400 ops/h, while DC-3 and DC-5 both allow 350 ops/h. These numbers matter when you are sizing the contactor for a fast-cycling application — the AC-4 figure is the one to watch if the load sees frequent reversals or inching.
Auxiliary Contact DC Breaking Capacity
The auxiliary switch on this contactor has documented DC breaking capacities at several control voltages: 6 A at 24 V DC, 2 A at 48 V DC, 2 A at 60 V DC, 1 A at 110 V DC, and 0.9 A at 125 V DC. If you are using the auxiliary contact to switch a DC pilot load or a PLC input, stay within these limits — a 24 V DC load up to 6 A is fine, but at 110 V DC the same contact is only rated for 1 A. The arcing time is 10 to 15 ms, which is typical for a DC break and means the contact extinguishes the arc quickly.
Mounting, Wiring, and Clearances
The contactor is fastened by screw fixing through a single 9 mm diameter hole. Mounting position is flexible: it can be mounted on a vertical surface with ±90° rotation, and tilted ±22.5° forward or backward. Dimensions are 172 mm high, 120 mm wide, and 170 mm deep. Minimum clearances to adjacent components: 10 mm upwards, 10 mm downwards, 10 mm to the side, and 20 mm forwards. The terminal blocks accept solid or stranded wire: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or up to 2x (0.75 to 4 mm²). That covers most panel wiring sizes — if you are landing 4 mm² conductors, you can double them up per terminal.