Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NBE1977B found under Rectifier Semiconductor Device U by North Bay Electronics Inc. The National Stock Number assigned to this part is 5961013223215, 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 NBE1977B.