SC vs LC vs FC vs ST vs MPO: Fiber Connector Comparison
Fiber optic connectors come in several types, each with specific use cases. Choosing the right connector is essential for network performance and compatibility.
SC Connector
Square, push-pull design. Most popular for GPON/EPON networks. 2.5mm ferrule. Good performance for both single-mode and multimode. Used in ODF, patch panels, and ONT/ONU devices.
LC Connector
Small form-factor, similar to SC but half the size. 1.25mm ferrule. Preferred for high-density data centers. Used with SFP/SFP+ transceivers. Ideal for 10G/25G/40G applications.
FC Connector
Round, screw-on design. Most secure connection. Used in test equipment, laser sources, and high-vibration environments. Being phased out in favor of SC/LC for most new installations.
ST Connector
Round, bayonet-style connection. Common in older installations and military networks. Being replaced by SC and LC in modern networks.
MPO/MTP Connector
Multi-fiber connector supporting 8, 12, or 24 fibers. Used for 40G/100G/400G parallel optics. Essential for QSFP/QSFP28 transceivers. Requires careful polarity management.
