The 4EU2552-0EC00-4BA0: The 4000 Hz rated frequency tells you this reactor is tuned for a drive switching at that carrier frequency — match it to your inverter's PWM setting, not the motor's base speed. The 0.14 mH inductance and 6 % impedance (per the description) are sized for a 91.8 A line current, so it'll smooth the current waveform and limit dv/dt on a motor cable run of moderate length. IP00 means no enclosure — it's a bare core-and-coil assembly meant for a cabinet where the panel itself provides the environmental seal. Mount it where it gets some airflow; the combined copper and iron losses run about 156 W at rated load, and the thermal class H insulation (180 °C hot-spot) gives you headroom if the cabinet ambient hits 40 °C. Terminals are flat-type connectors — no screw-clamp rings. You'll need a ring tongue or a bus-bar tab to mate. The footprint is 0.22 m wide by 0.21 m tall by 0.16 m deep; check your panel floor before committing.
This part carries a mature lifecycle status — it's an established catalog item, not a phase-out. The 5SY6020-7KL and 5SL6606-7YA are miniature circuit breakers, not output reactors, so they're not a functional cross; don't chase them as a second-source. If you need a reactor for a 91.8 A, 4000 Hz drive output, this SIDAC unit is the direct fit.