Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MA39128S-001 found under Electron Tube by Semic Rf Electronic Gmbh. The National Stock Number assigned to this part is 5960013064606, and the Federal Supply Class is 5960 Electron Tubes And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MA39128S-001.