Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 0078N21N00A040T20E5X8Q4XA found under Resistor Thermal by Rosemount Inc. The National Stock Number assigned to this part is 5905015869990, 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 0078N21N00A040T20E5X8Q4XA.