What it is and what it does
The Siemens 4EU3622-4CA00-0AA0 is a three-phase commutating choke (line reactor) designed for converter front-ends. It limits current rise and reduces harmonic distortion on the AC line feeding a variable-frequency drive or DC drive. Rated 360 A continuous with a 400 A maximum and 500 A peak capability, it handles the inrush and transient loads typical of industrial drive systems. Inductance is 0.07 mH per phase at 50 Hz, with a relative inductive voltage drop of 4% at the rated current and voltage — a standard figure for commutating chokes that keeps voltage sag within acceptable limits for the DC bus. Operating voltage is 500 V AC, and the part carries a thermal class H (180 °C) insulation system per IEC 60085, meaning the winding can sustain higher temperature rises than class F or B designs — relevant if the choke sits in a warm cabinet or near the drive's heat sink.
Mounting and integration
IP00 rating means no enclosure protection — this is an open-frame choke intended for installation inside a panel or drive cabinet. Dimensions are 0.35 m wide by 0.321 m tall by 0.227 m deep; verify clearance for the flat-type main circuit terminals (bus-bar or cable lug connection) and for airflow around the core. Total power loss is 475 W (293 W in the coil plus 182 W in the iron core) at rated load and 40 °C ambient. That heat must be evacuated from the enclosure — factor it into the panel's thermal budget and consider forced ventilation if the cabinet is densely packed.
Lifecycle and sourcing reality
The part is UL and CSA recognized per EN 61558-2-20, which covers the safety of chokes and reactors. That recognition matters for panel builders who need a UL 508A listing on the overall assembly.