What it is and what it does
The Siemens 4EU3622-5AA00-0AA0 is a three-phase commutating choke (line reactor) built for converter front-ends — it sits between the AC supply and the rectifier to limit current rise, smooth commutation notches, and reduce harmonic stress on the DC link. Rated for 500 V AC at 50 Hz, it carries a maximum current of 355 A and a continuous rated current of 319.5 A (cites:,). The 0.1 mH inductance produces a 4 % relative inductive voltage drop at the rated current, which is the typical design target for drive input reactors (cites:,). Total power loss splits between the coil (280 W) and the iron core (190 W), giving a combined 470 W dissipated as heat at full load — that's the number to budget for in the enclosure thermal calculation (cites:,).
Physical fit and mounting
The choke measures 0.35 m wide, 0.321 m tall, and 0.227 m deep — a substantial block that needs panel floor space and structural support, not a DIN-rail clip (cites:,). It's rated IP00, meaning no enclosure: it's an open-frame component intended for installation inside a cabinet or electrical room where the environment is clean and dry (cites:). Main circuit connections are flat-type terminals — expect bus-bar or heavy cable lugs, not screw-clamp blocks (cites:).
Thermal class and operating conditions
Insulation system is thermal class H per IEC 60085, which means the winding can handle a 180 °C hot-spot temperature — a margin that matters when the choke is in a warm cabinet or running near its 40 °C rated ambient (cites:,).
Lifecycle and sourcing
We source the 4EU3622-5AA00-0AA0 to order against an RFQ. Because it's a mature, high-current choke with no direct plug-in replacement, the buying decision is straightforward: confirm the 0.1 mH / 4 % impedance matches your drive system's required line reactor, and we'll quote current availability and pricing at quote time.