Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4284023-4 found under Circuit Breaker by Fki Engineering Ltd T A Whipp. The National Stock Number assigned to this part is 5925012726779, 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 4284023-4.