Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ERZCO20DK121 found under Resistor Voltage Se by Panasonic Electronic Components. The National Stock Number assigned to this part is 5905013659341, 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 ERZCO20DK121.