Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 883 40257B found under Microcircuit Digita by Allegro Microsystems Inc. The National Stock Number assigned to this part is 5962012550813, 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 883 40257B.