What this SIRIUS motor starter is
The Siemens 3RA1145-4JD44-1AV6 is a SIRIUS non-fused motor starter, Size S3, configured as a direct starter. It ships with the 3RT1044-1AV60 contactor and the 3RA1941-1AA00 link module, so it arrives as a pre-assembled combination ready for panel integration. Rated 63 A at 480 V AC-3 (motor duty), it handles motors up to 50 hp at 460/480 V and 60 hp at 575/600 V. The unit snaps onto 60 mm busbar systems (mounting position vertical), which speeds panel assembly and eliminates separate busbar wiring. Clearance requirements: 90 mm upwards, 10 mm forwards, 6 mm backwards, 10 mm downwards, and 12 mm at the side.
No official replacement has been announced. The 3RA1145-4JD44-1AV6 remains the direct order code for this Size S3, 63 A, Trip Class 10 configuration.
Dimensions: 244 mm depth × 70 mm width × 354 mm height. The S3 footprint fits standard motor-starter slots in 800 mm wide enclosures; allow the listed clearances for heat dissipation and cable bending radius. Main contact stranded wire range: 2.5... 70 mm², or 2× (10... 50 mm²). Operating temperature range –20 to +60 °C; storage –50 to +80 °C; transport –55 to +80 °C. Pollution degree 3 (industrial environment). Rated insulation voltage 690 V. The 50/60 Hz operating range is 384... 528 V, so it works on both 400 V and 480 V systems without derating.