Ratings and What They Mean for Your Panel
The 3RT1034-3AV00: The AC-3 rating (18.5 kW at 400 V) is the figure that governs motor starting — it covers squirrel-cage motors where the contactor makes and breaks the load under running conditions. The AC-4 rating (29 A at 400 V) is the one to watch if your application does plugging, inching, or reversing, because that duty cycle sees higher switching stress. At 690 V the AC-3 rating drops to 10 kW, which is typical for the voltage derating on this frame size. The auxiliary contact block is rated for 10 A at 24 V, 6 A at 230 V, and 0.3 A at 220 V DC — these are the figures for the control circuit, not the main poles. If you're switching a PLC output or a relay coil, the 24 V DC rating is the one that matters; the DC ratings drop sharply with voltage because of arc extinction limits. Operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C. The IP20 rating on the front means it's protected against finger contact but not against moisture — this is a panel-mounted device, not a field-mounted one. The terminal area is rated IP00 (no protection), so it must be inside an enclosure.
Mounting and Wiring
Mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 50022. The S2 frame is 55 mm wide and 112 mm tall, with a depth of 115 mm — that's the full body depth including the arc chute. Side-by-side mounting is permitted, which saves rail space when you're stacking multiple contactors in a motor control center. Main circuit terminals are screw-type, accepting 2x (0.75...16 mm²) solid or stranded, or 2x (0.25...2.5 mm²) solid for the control circuit. The stranded range goes up to 25 mm² on the main terminals.