Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 20A2644-0131 found under Rectifier Semiconductor Device U by Solid State Devices Inc. The National Stock Number assigned to this part is 5961003013468, 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 20A2644-0131.