Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PT280-4-7K found under Transformer Power by Kelvin Industries Inc. The National Stock Number assigned to this part is 5950009080668, 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 PT280-4-7K.