Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number W5RSF1D found under Transformer Power A by Technipower Llc. The National Stock Number assigned to this part is 5950008800354, 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 W5RSF1D.