Key ratings and what they mean for fit
The 3RT1044-1AL24: Rated at 37 kW at 500 V, this S3-frame contactor handles induction motors up to that power level in standard AC-3 duty. The 70 mm width and 146 mm height fit a standard DIN-rail footprint; the 188 mm depth is the dimension to watch when sizing the enclosure depth against the gland plate or back panel clearance. The screw-type terminals accept solid conductors up to 2x 4 mm² and stranded conductors up to 2x 50 mm², covering most panel wiring from control circuits to motor feeders. IP20 on the front with cover or box terminal protects against finger contact; the terminal body itself is IP00, so the panel enclosure provides the environmental seal. Operating temperature range of -25 to +60 °C suits most indoor industrial environments without derating concerns. Side-by-side mounting is permitted, which simplifies multi-contactor motor starter assemblies on a single DIN rail.