Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TD40479 found under Transformer Power S by William S Guttenberg. The National Stock Number assigned to this part is 5950000909347, and the Federal Supply Class is 5950 Coils And Transformers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like TD40479.