SIRIUS S2 Power Contactor — 3RT1034-1AL20
Rated for AC-2 duty at 15 kW on a 400 V supply, this contactor handles wound-rotor motor applications where moderate inrush and frequent switching are expected. At 500 V it delivers 18.5 kW, and at 690 V it provides 10 kW — covering the common European motor voltage tiers.
Duty Cycle and Switching Frequency
Maximum switching frequency varies by duty class: 1,200 operations per hour at AC-1 (resistive loads), 1,000 at AC-3 (squirrel-cage motors), 750 at AC-2, and 250 at AC-4 (plugging/inching). The AC-4 limit reflects the heavier arc stress during reversing or jogging cycles.
Solid wire capacity ranges from 2x (0.5 to 1.5 mm²) up to 2x (0.75 to 4 mm²), while stranded accepts 2x (0.75 to 25 mm²) — enough for the full rated current without paralleling. Auxiliary contact wiring uses the smaller solid range.
Environmental and Protection Ratings
Pollution degree 3 suits it for control panels in industrial environments with conductive contamination. The enclosure is IP20 on the front (finger-safe terminals) and IP00 at the terminal points — install inside a cabinet or enclosure.