What this choke is and where it lands
The Siemens 4EU2722-7BA00-0AA0 is a 3-phase commutating choke for converter applications, rated at 400V AC and 50Hz. It handles a maximum AC current of 280A and a rated AC current of 252A, with a peak current capability of 350A. The inductance is 0.075mH with a relative inductive voltage drop of 4% at rated conditions. This is the line reactor that sits between the converter and the motor or supply, limiting di/dt and reducing harmonic distortion on the DC link.
The ratings that matter for fit
The 280A maximum AC current and 252A rated AC current tell you this choke is sized for a 250–280A drive output, not a 400A frame. The 343.1A DC rated current gives the DC-link side its limit. The 4% inductive voltage drop at rated current is typical for a commutating choke — it provides enough impedance to smooth commutation without dropping excessive voltage under load. The IP00 enclosure means it's an open-frame component for cabinet mounting, not standalone outdoor use. Thermal class H (180°C) insulation per IEC 60085 means it can run hot in a crowded panel without derating prematurely.
What it connects to and how it mounts
The 4EU2722-7BA00-0AA0 is an open-frame choke (IP00) designed for bolting into a cabinet or on a mounting plate — no DIN-rail clip here. Dimensions are 0.27m wide, 0.248m high, 0.187m deep. The flat-type terminals on the main circuit accept busbar or crimp lugs, typical for high-current converter connections. It's built to EN 61558-2-20, the standard for chokes and reactors. The 50Hz rating means it's tuned for 50Hz mains; if your site runs 60Hz, the inductance and saturation behavior shift — verify the application before dropping it into a 60Hz line.