The SC is a snap-in connector that is widely used in single mode systems for its performance. The SC connector is also available in a Duplex configuration. They offer low cost, simplicity, and durability. SC connectors provide for accurate alignment via their ceramic ferrules. They feature a 2.5 mm Ferrule and molded housing for protection. Typical matched SC connectors are rated for 1000 mating cycles . View all Fiber Optic Connectors.