The Siemens SIRIUS 3RT1034-1AM20 is an S2-size power contactor, screw-type terminals for the main circuit, designed for snap-on mounting onto 35 mm DIN rail per EN 50022. Rated for 50/60 Hz operation, it carries AC-3 motor switching duty at 400 V and delivers 15 kW in AC-2 service at the same voltage. The 55 mm width and 112 mm height fit standard panel layouts with side-by-side mounting permitted.
Terminal Sizing and Wiring
Solid wire accepts 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and max 2x (0.75 to 4 mm²). Stranded goes up to 2x (0.75 to 25 mm²) or 2x (0.75 to 16 mm²) for solid or stranded. That covers most panel power and control wiring without adapters. Pollution degree 3 rating means it's suited for industrial environments with conductive contamination.
Switching Rates and Coil Timing
Maximum switching rates vary by duty: 1,200 cycles/hour for AC-1 resistive loads, 1,000 for AC-3 motor starting, 750 for AC-2, and 250 for AC-4 plugging/inching. Operating time at AC is 7 to 20 ms with arcing time of 10 to 15 ms. Mechanical life is typical 10,000,000 operations.
Environmental and Mounting
Operating temperature range is -25 to +60 °C; storage from -55 to +80 °C. Front face is IP20 for finger-safe touch; terminal area is IP00 (no protection). Fastening is screw and snap-on onto 35 mm rail per DIN EN 50022. Side-by-side mounting is allowed without derating in most configurations.