What it is and what it does
The Siemens 4EU3622-5DA00-0AA0 is a three-phase commutating choke for converter applications, rated for 750 V AC operating voltage with a maximum continuous current of 280 A at 50/60 Hz. Its rated inductance is 0.00016 H (0.16 mH) with a relative inductive voltage drop of 4% at rated current and frequency. The choke is designed to limit current rise and reduce harmonic distortion in the DC link of variable-speed drives and power converters — a key component for protecting downstream semiconductors and smoothing commutation notches.
Ratings and what they mean for fit
The 280 A maximum current and 252 A rated current define the continuous thermal capacity at 40 °C ambient. The 350 A peak rating handles short-duration overloads typical during motor startup or fault clearing. The 750 V AC operating voltage suits 690 V line-to-line systems with margin. The 4% voltage drop at rated current and frequency is the impedance that limits di/dt — critical for matching the choke to the converter's DC-link design. The IP00 protection class means it is open-frame; it must be installed inside a cabinet or enclosure that provides the required ingress protection. The thermal class H insulation allows a 180 °C hot-spot temperature, giving headroom in high-ambient or overload conditions.
Integration notes
The choke measures 0.35 m wide, 0.321 m high, and 0.227 m deep. It uses flat-type terminals for the main current circuit — expect busbar or heavy-gauge cable lugs. The IP00 enclosure means it must be mounted inside a panel with adequate ventilation; the total power loss is 500 W (320 W coil + 180 W iron core), so forced air or a derated enclosure is recommended if ambient exceeds 40 °C. The 0.16 mH inductance at 280 A is a substantial component — verify mounting footprint and busbar clearance before committing the panel layout.