Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TS-3980 found under Microcircuit Assemb by Microsemi Corp Massachusetts. The National Stock Number assigned to this part is 5962011803431, and the Federal Supply Class is 5962 Microcircuits Electronic. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like TS-3980.