What it is and what it does
The Siemens 3RT5036-1AQ00 is a SIRIUS power contactor in frame size S2, built for switching motor loads in industrial control panels. Its AC-3e rating of 24 A at 690 V means it handles three-phase induction motors up to that current in the most common switching duty — starting and stopping a running motor. At 400 V and 60 °C ambient, it delivers 38 kW, which is the number most panel builders size against for a 400 V line. The contactor mounts on a 35 mm DIN rail per EN 50022, with screw and snap-on fastening. Screw-type terminals on both the main and auxiliary/control circuits accept up to 16 mm² (2x) solid or stranded wire, or 2x 18–2 AWG. The 55 mm width and 115 mm depth mean it fits standard 200 mm deep enclosures with room for side-by-side mounting.
Where it goes and what it needs
Rated insulation voltage is 690 V, so it's suited for 400 V and 690 V line-to-line systems. The operating temperature range of -25 to +60 °C covers most indoor panel environments; storage range of -55 to +80 °C handles warehouse extremes. Pollution degree 3 means it's rated for industrial atmospheres with conductive pollution — no additional conformal coating required for typical panel duty. Mounting position allows +/-180° rotation on a vertical surface and tilting forward/backward by +/-22.5°, giving flexibility in tight enclosures. Side-by-side mounting is permitted without derating for the AC-3e current, so you can pack multiple contactors on the same rail.
Lifecycle and sourcing reality
RoHS compliance is confirmed with a substance prohibition date of March 1, 2017, covering the EU RoHS directive. The part carries the SIRIUS brand, which is Siemens' standard industrial contactor family with broad UL/CSA/CE acceptance across markets.