What It Is and Where It Goes
The Siemens 4EP3802-0DS00 is a three-phase commutating choke (line reactor) for converter drives, rated 500 V AC at 50 Hz. It sits between the supply and the converter input to limit current rise, reduce harmonics, and protect the DC link from line notching. The 0.81 mH inductance with a 4% relative inductive voltage drop is sized for a 35.5 A maximum continuous current (31.95 A rated, 44 A peak).
Current Ratings and Thermal Class
The 35.5 A Ithmax is the thermal current rating at 40 °C ambient. The 31.95 A rated current is the nominal operating point at 4% voltage drop. Total coil power loss is 69 W, with 14.5 W iron-core loss.
Physical Fit and Connections
Footprint is 0.178 m wide × 0.153 m tall × 0.12 m deep. Protection class IP00 means it's an open-frame component — no touch protection, so it must be mounted inside a locked cabinet or behind a panel door. Main circuit connects via screw-type terminals, which accept standard power wiring. The choke is not a DIN-rail device; it bolts to a mounting plate.