SIRIUS Size S00 Power Contactor, 24 VDC Coil
The Siemens SIRIUS 3RT2018-1BP42 is a Size S00 power contactor with a 24 VDC magnet coil terminated at screw-type terminals. It is rated for 10 A at 24 VDC, with DC-13 switching capability down to 0.3 A at 220 V. The contactor carries a 2 hp rating at 230 V and 3 A at 400 V for AC loads. Mechanical life is typical 30,000,000 operations. Mounting is via screw and snap-on onto 35 mm standard mounting rail per DIN EN 60715. The contactor accepts solid or stranded conductors 0.5 to 4 mm², and dual conductors 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm².
Switching Performance and Duty Cycles
Maximum switching rates vary by duty: 1,000 operations per hour at AC-1 (resistive), 750/h at AC-2 and AC-3 (motor starting/running), 750/h at AC-3e, and 250/h at AC-4 (plugging/inching). Arcing time is 10 to 15 ms; DC switching times are 7 to 13 ms.
Environmental and Mounting
Operating temperature range is -25 to +60 °C; storage range is -55 to +80 °C. Mounting position allows +/-180° rotation on a vertical surface, and can be tilted forward/backward by +/-22.5°. Clearance distances: 10 mm upward, 10 mm forward, 10 mm downward, 6 mm at the side.