Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4N55 883B found under Coupler Optoelectro by Avago Technologies Us Inc. The National Stock Number assigned to this part is 5980012451230, 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 4N55 883B.