What the cover actually is
The 6SL5166-3AF00-0AA0 is a SINAMICS S220 spare-part DC link cover sized for the 150 mm line/motor module — the plastic shroud that isolates the DC bus terminals on the top of the power block, not a functional power component itself. It exists to replace a damaged or lost cover on an otherwise-healthy drive after a service event, so the drive can pass a touch-safety inspection per the cabinet standard in use. That class-of-supply matters operationally: each unit is built against the order and cannot be returned for credit, so the BOM line should commit to a specific need rather than a speculative stock cushion.
Catalog codes and compliance footprint
Catalog metadata places the part under Group Code R220 and Product Group X0HX, with single-piece packaging. RoHS compliance is dated since 26-01-23, and REACH Article 33 duty-to-inform is declared via the standard Reach Information notice. Export-control classification is AL:N / ECCN:EAR99H, which is the lowest-friction export tier for a service part of this kind.
Sourcing posture for a service spare
Because the part is class C and active, the realistic supply path is quoted-to-order against the BOM quantity — confirm availability and current pricing at RFQ. No official successor is published (no L* entry carries one), and the listing peers on file (a SINAMICS V20 basic converter and two air-cooled power modules in blocksize format) are full drives, not covers, so they are not plug-compatible substitutes.