Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number T21-1-7.50A-01-1 found under Circuit Breaker by North American Philips Corp. The National Stock Number assigned to this part is 5925012136398, 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 T21-1-7.50A-01-1.