Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SEN-B-163 found under Rectifier Semiconductor Device U by Rsm Electron Power Inc. The National Stock Number assigned to this part is 5961001920461, 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 SEN-B-163.