Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FXD63B200NAV found under Circuit Breaker by Siemens Energy And Automation Inc. The National Stock Number assigned to this part is 5925016538035, and the Federal Supply Class is 5925 Circuit Breakers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like FXD63B200NAV.