SIRIUS Power Contactor, 110 V DC Coil, Spring-Terminal
The Siemens SIRIUS 3RT2036-3XF40-0LA2 is a size S2 power contactor with a 110 V DC coil and spring-type terminals on the magnet coil. It carries a 52 A rated operational current at both 480 V and 600 V, and is rated for 10 hp motor loads at 230 V. The contactor includes an auxiliary switch and is designed for screw and snap-on mounting onto 35 mm DIN rail per DIN EN 60715.
Ratings and Application Context
The 52 A rating at 480 V and 600 V means this contactor handles motor loads up to that current in AC-3 duty, typical for conveyor, pump, and fan applications in industrial control panels. The 110 V DC coil draws a 1.5 A inrush peak and holds with a dropout ratio of 0.7 of rated value. The spring-type terminals accept 2x (0.5 to 2.5 mm²) solid or stranded wire, reducing wiring time compared to screw terminals. Auxiliary contact ratings span from 10 A at 24 V DC down to 0.3 A at 220 V DC, covering pilot duty and PLC input signaling. The main contacts are configured as 3 normally open (3NO) with one normally closed (1NC) auxiliary, per the 18...1 designation.
Mounting and Environmental Flexibility
Mounts on 35 mm DIN rail via screw and snap-on, or directly with screws. The mounting position allows +/-180° rotation on a vertical surface and can be tilted forward/backward by +/-22.5°, giving panel builders layout flexibility. Clearance distances are 10 mm upwards, forwards, and downwards, and 6 mm at the side. Operating temperature range is -40 to +70 °C, with storage from -55 to +80 °C, suitable for unheated enclosures or outdoor cabinet installations. Mechanical life is rated at 10 million operations typical.