Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number QSB28-8SMRM found under Power Supply by Raytheon Technical Services Company. The National Stock Number assigned to this part is 6130001772454, 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 QSB28-8SMRM.