Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SL550D DG found under Microcircuit Linear by Zarlink Semiconductor. The National Stock Number assigned to this part is 5962014441363, 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 SL550D DG.