What it is and where it lands
The Siemens 3RT2045-1AR64 is a SIRIUS power contactor in the S3 frame size, designed for switching motor loads and resistive loads in industrial control panels. It mounts via screw fixing or snap-on onto 35 mm DIN rail per DIN EN 60715, and the mounting position allows ±180° rotation on a vertical surface plus ±22.5° tilt forward/backward — useful when fitting into tight enclosures or existing bus layouts.
Key ratings and what they mean for your BOM
Rated 15 hp at 230 V, this contactor handles typical 3-phase induction motors in that power band — think small conveyors, pumps, or fans in a food-and-beverage line. The AC-3 maximum switching rate of 1 000 1/h means it cycles a motor load about once every 3.6 seconds continuously; that's fast enough for most cyclic applications but not for high-speed indexing. AC-4 drops to 300 1/h, reflecting the heavier wear from inching or plugging duty. Operating temperature range of -25 to +60 °C covers most indoor panel environments, including non-conditioned plant floors. Storage range extends to -55 to +80 °C, which governs handling and warehousing, not running conditions.
Panel integration notes
Dimensions are 140 mm high, 70 mm wide, 195 mm deep — the S3 frame fits standard 200 mm deep enclosures with room for wiring ducts. Solid conductor range is 2.5 to 16 mm²; stranded accepts 6 to 70 mm². The magnet coil uses screw-type terminals, and auxiliary switch is included. Clearance distances: 10 mm upwards, 20 mm forwards, 10 mm sideways, 10 mm downwards — plan your DIN rail spacing accordingly.