What is the square connector on a fiber optic patch cord called

The square connector type in fiber optic patch cords refers to the SC (Subscriber Connector), featuring a push-pull design with a 2.5mm ferrule for reliable, low-loss connections.Overview of SC ConnectorsThe SC connector is a widely used square-shaped fiber optic connector known for its push-pull mechanism, which allows for easy insertion and removal without twisting or screwing . The connector contains a ceramic ferrule with a diameter of 2.5mm, which ensures precise alignment of the fiber cores and minimizes signal loss . Inside the connector, a spring mechanism maintains proper contact between the ferrule and the mating adapter, providing stable optical performance .Key FeaturesSquare, snap-in design: Simplifies installation and ensures secure connections in patch panels and distribution frames .Push-pull operation: Quick and convenient engagement and disengagement without tools .Low insertion loss and return loss: Typically provides reliable optical performance suitable for both single-mode and multimode fibers .Durability: Good compression strength and mechanical stability, making it suitable for telecom and datacom environments .ApplicationsSC connectors are commonly used in:Gigabit Ethernet networksTelecommunication systemsData centers and enterprise networksPassive Optical Networks (PON) for FTTH deployments They are particularly favored in legacy and standard network installations due to their simplicity, cost-effectiveness, and reliable performance.Comparison with Other ConnectorsLC connectors: Smaller form factor, ideal for high-density applications.ST connectors: Bayonet-style, older design, less common today.FC connectors: Screw-on type, used in high-vibration or laboratory environments.MPO/MTP connectors: Multi-fiber, used for high-speed parallel optics in data centers .SummaryThe SC square connector is a robust, easy-to-use fiber optic connector suitable for a wide range of network applications. Its push-pull design, 2.5mm ferrule, and low-loss performance make it a reliable choice for both single-mode and multimode patch cords, particularly in telecom, datacom, and PON systems . Choosing SC connectors ensures compatibility with standard network equipment and simplifies installation and maintenance.