Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number UTO-521 found under Microcircuit Linear by Kontron Ag. The National Stock Number assigned to this part is 5962010289373, 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 UTO-521.