The Siemens 3RT1035-3AF08-0PA3 is a SIRIUS power contactor in Size S2, rated for motor switching at 22 kW at 500 V AC-3 and 11.4 kW at 690 V AC-3. For heavy inching and plugging duty (AC-4), it handles 35 A at 400 V. The screw-type main circuit terminals accept 2x (0.75...25 mm²) stranded or 2x (0.25...2.5 mm²) solid wire, with a minimum permissible cross-section of 16 mm² at 40 °C. Pollution degree 3 suits industrial environments with conductive contamination.
The 22 kW at 500 V AC-3 rating governs motor switching under normal starting duty — that is the figure to match against your motor nameplate. The 35 A AC-4 rating at 400 V covers the more severe inching and counter-current braking cycles, where contact wear accelerates. Mechanical life is typical at 10 million operations. The 115 mm depth and 85 mm width fit standard S2 contactor footprints; verify rail space against existing enclosures.
Substance prohibitance date of 05/01/2012 aligns with RoHS and REACH compliance expectations for this manufacturing vintage. The SIRIUS series carries IEC and UL certifications through Siemens' standard approvals; verify specific UL file numbers against your local code requirements.