Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 50402B20 found under Spring Circuit Breaker by Brown Boveri And Cie Ag. The National Stock Number assigned to this part is 5360000160182, and the Federal Supply Class is 5360 Coil Flat Leaf And Wire Springs. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 50402B20.