Output Reactor for 3-Phase AC Drives
The Siemens SIDAC 4EU4551-0AG18-0B is a 3-phase output reactor rated for 745 A maximum continuous current and a rated frequency of 1250 Hz. It is designed to sit between a variable-frequency drive and the motor, smoothing the PWM waveform and limiting voltage spikes that can degrade motor insulation over time. Inductance of 0.000079 H per phase filters the drive output. Mounting dimensions are 0.46 m wide by 0.43 m tall by 0.29 m deep — verify panel floor space before committing the BOM line.
Thermal and Electrical Ratings
The combined power loss (coil 671 W plus iron core 412 W) totals about 1.08 kW dissipated as heat; factor that into the cabinet ventilation design. The flat-type terminals accept busbar or large cable lugs — no ring-tongue or spring-cage connection. Verify the lug width fits the terminal pad before wiring.
Mature lifecycle status. Sourced to order; availability confirmed at quote time.