Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MDA920A9 found under Rectifier Semiconductor Device U by Rochester Electronicsllc. The National Stock Number assigned to this part is 5961011696509, and the Federal Supply Class is 5961 Semiconductor Devices And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MDA920A9.