The 3RT1075-6AU36: The S12 frame is built for higher current ranges — the main power circuit accepts stranded cable from 70 up to 240 mm², so this contactor is sized for heavy motor feeders or large resistive banks. The magnet coil is screw-type terminals rated 240... 277 V AC, with a pickup threshold of 0.8 x rated value. Switching rates vary by duty class: 700 operations/hour under AC-1 (resistive), 500 under AC-3 (squirrel-cage motor starting), and 130 under AC-4 (plugging/inching). The AC-3e rate matches the AC-3 figure at 500 ops/hour. Auxiliary contacts are included and wired via solid or stranded conductors: 2x (0.5... 1.5 mm²), 2x (0.75... 2.5 mm²), or max 2x (0.75... 4 mm²).
Clearances: 10 mm upwards, downwards, and to the side; 20 mm forward for arcing clearance. Overall dimensions — 225 mm deep, 160 mm wide, 214 mm high — mean it needs a fair chunk of panel depth. Plan for at least 250 mm enclosure depth to allow wiring and cooling.