Mounting and wiring
The 3RT1045-1AL20-ZW97: Snaps onto 35 mm or 75 mm DIN rail (screw and snap-on mounting) and measures 70 mm wide by 146 mm tall by 139 mm deep — the S3 footprint fits a standard panel grid; leave clearance for the arc chamber and terminal access. Main current circuit uses screw-type terminals; stranded cable from 10 to 50 mm², solid from 0.5 to 4 mm² (two per clamp). The front face carries IP20 protection with the cover or box terminal installed; the terminal body itself is IP00, so live parts are exposed behind the panel door.
Duty and endurance
Rated for 10 million mechanical cycles typical, with AC-3 switching rates up to 1000 operations per hour — enough for frequent-start applications like short-cycle conveyors or indexing tables. Operating temperature range is -25 to +60 °C; storage from -55 to +80 °C.