Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number LM139J 883B found under Microcircuit by Excelitas Canada Inc. The National Stock Number assigned to this part is 5962012119194, 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 LM139J 883B.