Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HT40 5B50 6494 found under Transformer Power by Systron Donner Corp. The National Stock Number assigned to this part is 5950008908522, 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 HT40 5B50 6494.