Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2278520 found under Microcircuit Hybrid by Teledyne Technologies Inc. The National Stock Number assigned to this part is 5962012861424, 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 2278520.