SIRIUS Coupling Contactor for 24 V DC Control Circuits
The Siemens SIRIUS 3RT2015-1JB42 is a size S00 coupling contactor with a 24 V DC magnet coil and screw-type terminals. It's rated for 10 A at 24 V DC, making it a direct fit for DC switching applications in control panels where the contactor couples a load to a DC bus or signal. The S00 frame keeps the footprint compact at 45 mm wide, and the screw and snap-on mounting onto 35 mm DIN rail per DIN EN 60715 means it integrates into standard panel layouts without adapter plates.
Ratings and Operating Conditions
The 24 V DC coil is the part's defining feature — it pulls in with a typical pickup time of 38 to 65 ms and an arcing time of 10 to 15 ms. The contactor is rated for switching frequencies up to 750 cycles per hour under AC-3 and AC-2 duty, and up to 1000 cycles per hour under AC-1 resistive loads. For DC switching, the rated operational current drops with voltage: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, and 0.3 A at 230 V. Ambient operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C.
Mounting and Wiring Clearances
Mounting position is flexible: +/-180° rotation on a vertical surface, and can be tilted forward/backward by +/-22.5°. Clearance requirements: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side. The screw terminals accept solid or stranded conductors from 0.5 to 4 mm², and can handle two conductors per clamp in combinations like 2x 0.5-1.5 mm² or 2x 4 mm². The contactor has no built-in auxiliary switch — that's a separate add-on if needed.