Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number UPR5023ZB8K450D found under Resistor Fixed Film by Mepco Electra Inc. The National Stock Number assigned to this part is 5905011994317, and the Federal Supply Class is 5905 Resistors. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like UPR5023ZB8K450D.