Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2520-3 found under Microcircuit Memory by Modular Devices Inc. The National Stock Number assigned to this part is 5962011227301, 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 2520-3.