What This Part Is and What It Does
The Siemens SIRIUS 3RT1036-1AH20-1AA0 is a power contactor in the S2 frame size, designed for switching motor loads and resistive loads in industrial control panels. It mounts via screw and snap-on onto a 35 mm DIN rail per EN 50022, and the front face carries an IP20 rating while the terminals are IP00. For motor duty, the key rating is 22 kW at AC-2 utilization category at 400 V, which covers slip-ring motors and wound-rotor applications. It also handles 30 kW at 500 V and 11.4 kW at 690 V, giving flexibility across supply voltages common in European and export panels. The AC-3 rating at 400 V is 30 kW, covering standard squirrel-cage motors.
Mechanical and Electrical Fit
Dimensions are 112 mm height, 55 mm width, and 115 mm depth. The 55 mm width is the S2 standard — it occupies three 18 mm modular positions on the DIN rail, so check your enclosure fill factor. Side-by-side mounting is permitted, which saves rail space in multi-contactor groups. Wiring: the main current circuit uses screw-type terminals. Solid wire capacity is 2x (0.5…1.5 mm²), 2x (0.75…2.5 mm²), max 2x (0.75…4 mm²). Stranded accepts 2x (0.75…25 mm²), and solid or stranded goes up to 2x (0.75…16 mm²). That covers most panel wiring from control circuits up to motor feeders. Pollution degree 3 means it's rated for industrial environments with conductive pollution.
Environmental and Lifecycle
Operating temperature range is -25 to +60 °C, storage is -55 to +80 °C. The contactor is rated for 50/60 Hz operation with a voltage tolerance of 0.8…1.1 at 50 Hz and 0.85…1.1 at 60 Hz. Mechanical endurance is typical 10,000,000 operations, with maximum switching rates varying by duty: AC-1 at 1000 1/h, AC-3 at 800 1/h, AC-4 at 300 1/h.