SIRIUS 3RT2027-2KF40 Coupling Contactor — S0 Frame, 110 V DC Coil, Spring-Terminal
The Siemens 3RT2027-2KF40 is a SIRIUS coupling contactor in the Size S0 frame, designed for screw and snap-on mounting onto 35 mm DIN rail per DIN EN 60715. It is fitted with spring-type terminals on the magnet coil, and the main contact configuration is 18... 8 (normally open... normally closed). The rated coil voltage is 110 V DC, with an initial pickup value of 0.7 times rated and a full-scale dropout value of 1.25 times rated. Operating times at DC are 19... 21 ms for closure and 10... 10 ms for arcing.
Switching Capacity and Duty Ratings
For DC switching, the contactor is rated at 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 3 A at 400 V. At 230 V AC, the rated value is 5 hp. Maximum switching frequencies are 1,000 1/h at AC-1, 750 1/h at AC-2, 750 1/h at AC-3, 750 1/h at AC-3e, and 250 1/h at AC-4. These duty-cycle limits govern the thermal load on the contactor during repetitive operation.
Installation and Environmental Limits
Mounting position allows +/-180° rotation on a vertical surface and can be tilted forward/backward by +/- 22.5°. Required clearances: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side. Ambient operating temperature range is -25... +60 °C; storage range is -55... +80 °C. Conductor cross-sections accepted: solid 1... 10 mm², stranded 1... 10 mm², and 2x (0.5... 2.5 mm²) solid or stranded. Dimensions: width 45 mm, height 102 mm, depth 107 mm.
Lifecycle and Sourcing
The 3RT2027-2KF40 is at a current lifecycle stage per the manufacturer. No auxiliary switch is fitted (Auxiliary Switch: No). This part is sourced to order against an RFQ through independent distribution channels; availability and current pricing are confirmed at quote time.