SIRIUS Size S2 Power Contactor
The Siemens 3RT1036-1AP08-0MA0 is a SIRIUS-branded power contactor in the Size S2 frame, designed for switching motor loads and resistive circuits in industrial control panels. It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 50022, with side-by-side mounting permitted for dense panel layouts. Rated for AC-4 duty at 41 A and 400 V, this contactor handles the severe switching conditions of plugging or inching motor loads — the kind of high-stress duty that quickly wears standard contactors. For less demanding AC-2 applications (starting and running slip-ring motors), it carries 22 kW at 400 V. At 500 V it is rated for 30 kW, and at 690 V for 11.4 kW, making it suitable for 400 V to 690 V three-phase systems common in European and export panels.
Termination and Wiring
Main current circuit uses screw-type terminals. Solid conductors accepted in ranges: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and up to 2x (0.75 to 4 mm²). Stranded conductors from 2x (0.75 to 25 mm²) are supported, with a minimum permissible cross-section of 16 mm² at 40 °C. The front face carries IP20 protection, adequate for enclosed panels; the terminal area is rated IP00, meaning the contactor must be installed within an enclosure that provides the required system ingress protection.
Environmental and Compliance
Operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C. Pollution degree 3 rating means it tolerates conductive pollution typical of industrial environments (condensation, light dust). Mechanical endurance is rated at 10,000,000 typical operations. Maximum switching rates: 1,000 cycles/hour at AC-1, 800 at AC-3, 400 at AC-2, and 300 at AC-4.
Coil and Auxiliary Ratings
Coil operates at 50 Hz with a voltage tolerance of 0.8 to 1.1 times rated. Arcing time is 10 to 15 ms, with AC switching times of 7 to 20 ms. Auxiliary contact ratings: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V.