Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AT20-50 found under Circuit Breaker by Terasaki Electrical Co Ltd. The National Stock Number assigned to this part is 5925013743304, 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 AT20-50.