Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S1A-F found under Rectifier Semiconductor Device U by Diodes Inc. The National Stock Number assigned to this part is 5961016633343, and the Federal Supply Class is 5961 Semiconductor Devices And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S1A-F.