Off-delay auxiliary switch for SIRIUS contactors
The 3RT1926-2FK21: It clips onto the front of any SIRIUS 3RT1 contactor (sizes S00 through S3) and draws its operating power from the contactor coil terminals, so no separate control voltage is needed.
Switching ratings and contact load
The switch contacts are rated 3 A maximum — this is the total switching capacity, not per-pole. At 24 V DC the rating drops to 1 A, at 125 V AC it is 0.2 A, and at 250 V AC it is 0.1 A. Those derated figures matter when the auxiliary switch feeds a PLC input or a small relay coil: a 24 V DC solenoid pulling 0.5 A is fine; a 250 V AC pilot light drawing 80 mA is within the 0.1 A limit.
The block clips onto the contactor without tools — no extra DIN-rail space needed, since it rides on the contactor face. Mounting position is any orientation. The insulation class is basic, pollution degree 3, so it is suited for standard industrial control panels without special sealing. Dimensions are 33 mm wide, 46 mm high, 73 mm deep — the depth is the overhang past the contactor face, which matters when the panel door clearance is tight.