Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S1D1S3K found under Rectifier Metallic by Cougar Electronics Corp. The National Stock Number assigned to this part is 6130002269401, and the Federal Supply Class is 6130 Converters Electrical Non Rotating. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S1D1S3K.