What this contactor is and where it fits
The Siemens 3RT5036-1AN20 is a SIRIUS S2 power contactor — a screw-type, three-pole device sized for motor switching in control panels. It mounts on 35 mm DIN rail per DIN EN 50022, with screw and snap-on fastening, and allows ±180° rotation on a vertical surface plus ±22.5° tilt forward/backward, giving panel builders flexibility in tight enclosures.
Key ratings and what they mean for the buyer
Rated insulation voltage is 690 V, which sets the maximum voltage the contactor can safely withstand between live parts and ground — the ceiling for the circuit it goes into. The operating temperature range of -25 to +60 °C covers most industrial cabinet environments; the -55 to +80 °C storage range is wider, so it can sit in a warehouse or truck without damage. Mechanical endurance is 10 million operating cycles typical, which is the contactor's theoretical life before wear — you'll hit the electrical life limit (rated at 5 000 operations per hour at AC, with AC-3 max 800/h) well before that in motor duty.
Compliance and approvals
Substance prohibitance date is 03/01/2017, aligning with RoHS and REACH compliance timelines. Pollution degree 3 rating means it's suitable for industrial environments with conductive pollution (condensation, light dust).