Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ESB23030L found under Switch Box by Brown Boveri And Cie Ag. The National Stock Number assigned to this part is 5930013980270, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ESB23030L.