What it is and what it does
The Siemens SIRIUS 3RT1035-1AP00-1AA0 is a power contactor in the S2 frame size, designed for switching motor loads and resistive circuits in industrial control panels. It mounts on a 35 mm DIN rail per EN 50022, using either screw-clamp or snap-on fastening. The main current circuit terminates with screw-type terminals, rated for solid conductors up to 4 mm² and stranded up to 25 mm². Key motor ratings: 18.5 kW at AC-2 duty class at 400 V, and 35 A at AC-4 at 400 V. AC-2 covers slip-ring motor starting; AC-4 covers plugging and inching — the 35 A figure is the one that governs severe switching duty. At 500 V it delivers 22 kW, and at 690 V it delivers 11.4 kW. Auxiliary contact ratings span the control voltage range: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 0.3 A at 220 V. The coil operates on 50 Hz, with a rated control supply voltage of 230 V at 50 Hz.
Where it goes and how it fits
The S2 frame measures 55 mm wide, 112 mm high, and 115 mm deep — a standard footprint that fits alongside other SIRIUS S2 components on the same DIN rail. Side-by-side mounting is permitted, so no spacing gaps are needed between contactors in a multi-load panel. Environmental limits: operating temperature range of -25 to +60 °C, storage from -55 to +80 °C. Pollution degree 3 means it tolerates conductive pollution in typical industrial enclosures. The front face carries an IP20 rating (finger-safe), while the terminal area is IP00 — panel builders should account for that during gland-plate layout. Mechanical endurance is rated at 10,000,000 operations typical. Maximum switching rates vary by duty: 1,200 cycles/hour at AC-1 (resistive), 1,000 at AC-3 (motor running), and 300 at AC-4 (plugging/reversing). The arcing time sits between 10 and 15 ms.
Lifecycle and sourcing reality
RoHS compliance is indicated by a substance prohibitance date of 05/01/2012, aligning with the EU RoHS directive. The part carries the SIRIUS brand and is designed to IEC/EN 60947-4-1 standards for contactors and motor-starters.