What it is and what it does
The Siemens 4EU3622-6AA00-0AA0 is a three-phase commutating choke for converter applications, designed to limit current rise and reduce harmonic distortion in the DC link of a variable-speed drive or rectifier. It carries a rated current of 360 A at 500 V AC, 50 Hz, with a peak current capability of 625 A — meaning it can handle the repetitive switching surges typical of a 6-pulse or 12-pulse converter without saturating the core.
Key ratings and what they mean for fit
Rated inductance is 91 µH (0.000091 H) at the rated current and frequency. This value sets the commutation notch and limits the rate of rise of fault current — critical for protecting the converter's thyristors or IGBTs. The relative inductive voltage drop is 4 % at rated current, which is typical for line-side chokes and tells you the impedance at 50 Hz. The DC rated current is 490.1 A, higher than the AC rating because DC operation avoids the skin-effect losses in the winding. If your application is a DC-link choke in a regenerative drive or a battery-fed inverter, this is the figure that governs thermal sizing. Total power loss breaks down as 280 W in the coil and 212 W in the iron core, summing to 492 W at rated load. That heat must be dissipated into the surrounding air — the IP00 enclosure means no fan or filter, so the panel must provide forced ventilation or enough free-air volume to keep the ambient below 40 °C, the rated operating temperature. Thermal class H per IEC 60085 means the insulation system can withstand a continuous hot-spot temperature of 180 °C. That gives headroom for overloads and high ambient conditions, but the 40 °C ambient rating is the design point — derate above that.
Mounting and connections
The main circuit connects via flat-type terminals — expect busbar or large-cable lugs, not screw-clamp blocks. Dimensions are 0.35 m wide by 0.321 m tall by 0.227 m deep, so it occupies a substantial footprint in the panel. IP00 means no ingress protection; install it in a clean, dry cabinet away from conductive dust or dripping water.