SC and LC connectors have different size ferrules and cannot be mated.

• A. False
• B. True
• C. They Are The Same Size Ferrules
• D. They Can Be Mated With An Adapter

Answer: (B)

Ferrule size drives whether two fiber connectors can mate directly. SC uses a larger 2.5 mm ferrule, while LC uses a smaller 1.25 mm ferrule. Because the ferrule diameters and the way the fiber cores are aligned differ, they cannot be plugged together in a direct, one-to-one mating without risking misalignment and damage. In practice, you can connect SC to LC, but only with a hybrid adapter or other specialized hardware that accommodates both ferrule sizes and aligns the fibers properly. So the statement is true: direct mating isn’t possible due to the ferrule size difference.