Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number T3-9875C found under Transformer Power by Singer Co The. The National Stock Number assigned to this part is 5950007230104, 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 T3-9875C.