Common Optical Cable Connector Models

The most widely used optical fiber connectors include SC, LC, ST, FC, MPO/MTP, MT-RJ, and MU, each designed for specific applications and densities.

Overview of Common Connector Models

1. SC (Subscriber Connector)

• Square-shaped with a push-pull coupling mechanism.
• Uses a 2.5 mm ferrule.
• Common in FTTH deployments, data centers, and GPON networks.
• SC/APC variants are preferred where low return loss is critical . 2. LC (Lucent Connector)
• Miniaturized version of SC with a 1.25 mm ferrule.
• Latch mechanism similar to RJ45 for secure connections.
• Ideal for high-density applications in modern data centers.
• Supports duplex and simplex configurations . 3. ST (Straight Tip)
• Bayonet-style twist-lock mechanism.
• Primarily used in legacy systems, industrial, and military networks.
• Known for robust mechanical connections but less common in modern networks . 4. FC (Ferrule Connector)
• Threaded coupling for secure connections in high-vibration environments.
• High-precision alignment and low signal loss.
• Often used in factories, railway networks, and aviation systems . 5. MPO/MTP (Multi-Fiber Push On / Mechanical Transfer Push-On)
• Multi-fiber connectors capable of connecting multiple fibers simultaneously.
• Push-pull latch system for high-density, high-bandwidth applications.
• Common in data centers and high-performance networks . 6. MT-RJ (Mechanical Transfer – Registered Jack)
• Duplex connector resembling an RJ45 plug.
• Houses two 1.25 mm ferrules side by side.
• Used in multi-mode networks, mostly legacy applications . 7. MU (Miniature Unit)
• Very small form factor, about half the size of SC.
• 1.25 mm ferrule with push-pull mechanism.
• Designed for high-density patching, primarily in Japanese telecom networks .

Additional Notes

• Connectors are categorized as single-mode or multimode depending on fiber type.
• Most connectors are spring-loaded to ensure proper fiber alignment and minimal signal loss.
• Selection depends on network density, environment, and performance requirements, with LC and MPO/MTP dominating modern high-density installations, while SC, ST, and FC remain in legacy or specialized applications . This list covers the most commonly deployed optical fiber connectors in telecommunications, data centers, and industrial networks, providing a balance between legacy compatibility and modern high-density requirements.