Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number UC1903J-883B found under Microcircuit Linear by J Mfg. The National Stock Number assigned to this part is 5962012318313, 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 UC1903J-883B.