Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CA2-55 found under Coupler Optoelectronic by Siemens Microelectronics Inc. The National Stock Number assigned to this part is 5980010162716, and the Federal Supply Class is 5980 Optoelectrical Devices And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like CA2-55.