Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 852 503 52 found under Circuit Breaker by Ametek Programmable Power Inc. The National Stock Number assigned to this part is 5925011711832, 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 852 503 52.