The FC and ST are two different types of fiber optic connectors commonly used in telecommunications and networking applications. Here are the key differences between FC and ST connectors:
Connector Type: The FC connector is a screw-on connector that uses a threaded coupling mechanism, while the ST connector is a push-in connector that uses a bayonet-style coupling mechanism. The FC connector requires rotation to secure the connection, whereas the ST connector requires a push and twist action.
Ferrule Size: The FC connector typically uses a 2.5 mm ferrule, which aligns and connects the fiber cores. The ST connector, on the other hand, uses a larger 2.5 mm or 2.5 mm ferrule. The larger ferrule size of the ST connector can make it more robust and less prone to damage.
Application: The FC connector is commonly used in data centers, telecommunication networks, and high-density applications. It is often favored for its robustness and reliability. The ST connector, although less commonly used today, was widely used in older networks and is still found in some applications such as local area networks (LANs) and security systems.
Insertion Loss: Both FC and ST connectors provide good optical performance, but the FC connector generally offers slightly lower insertion loss than the ST connector. Insertion loss refers to the amount of light lost when the optical signal passes through the connector.
Connector Size: The FC connector is generally larger in size compared to the ST connector. The FC connector's larger size can make it less suitable for high-density applications where space is limited.
