Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number XF10020 found under Transformer Electri by Telephone Systems Communications. The National Stock Number assigned to this part is 5950008788488, 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 XF10020.