Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BSS123E6433 found under Transistor by Siemens Components Inc. The National Stock Number assigned to this part is 5961013747146, 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 BSS123E6433.