The Siemens 4EU2422-2AA00-0AA0 is a commutating choke for converter applications — a 3-phase line reactor that limits current rise and filters harmonics on the AC side of a drive or inverter. Rated 72 A continuous (80 A max) at 500 V AC, 50 Hz, with an inductance of 0.00046 H and a relative inductive voltage drop of 4% at rated conditions. That 4% voltage drop is the key sizing parameter: it tells you the choke will drop 4% of line voltage at full rated current, which is typical for a commutating (not a line) reactor — it's sized to protect the converter's semiconductors from commutation notches and di/dt stress, not to drop a large impedance for harmonic attenuation.
The 72 A rated current (80 A max) is the thermal continuous current at 40 °C ambient, thermal class H (180 °C insulation system per IEC 60085). The 0.46 mH inductance and 4% voltage drop are matched to a specific converter rating. If you're replacing a choke on an existing drive, verify the original's impedance percentage — swapping a 4% unit for a 2% or 6% unit changes the DC bus ripple and could affect drive stability or derate the output. Total power loss is 161 W (120 W coil + 41 W iron core). That's heat that stays in the enclosure — factor it into your cabinet thermal budget.
No discontinuation notice or last-time-buy date is on record.
The main circuit connects via flat-type terminals — expect bus-bar or crimp-lug connections, not screw-clamp or spring-cage. Panel footprint: 0.225 m wide × 0.21 m tall × 0.136 m deep. It's a panel-mount component, not DIN-rail; plan for dedicated mounting holes or a sub-panel.