Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BQ2-C040 found under Circuit Breaker by Challenger Electrical Equipment Corp. The National Stock Number assigned to this part is 5925013113639, 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 BQ2-C040.