Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AD40B2A1 found under Rectifier Semicondu by Cougar Electronics Corp. The National Stock Number assigned to this part is 5961008907722, 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 AD40B2A1.