If you are looking for the shelf life of SMD power inductors from Taiyo Yuden (such as NR Series, NR Series H type, NR Series S type, NR Series V type and NS series), this information can be found in the product catalog.
For example, NRS6010T220MMGF
NR(H,S,V) Series Catalog shows this part’s storage conditions as below.
If this SMD power inductor is stored properly and the storage area is well controlled within the supplier’s recommendation, these products should be used within supplier’s suggested period.
For more information, check out Useful Information on Shelf Life - Support / FAQs - Engineering and Component Solution Forum - TechForum │ Digi-Key (digikey.com)