ST and SC interface are two types of fiber optic connectors, for 10Base-F connection, the connector is usually ST type, for 100Base-FX, the connector is SC type in most cases. the core of ST connector is exposed, the core of SC connector is inside the. Answer first: select ST, SC, FC, LC, MPO/MTP, or another connector from the equipment interface, ferrule, fiber type, polish, polarity, density, insertion-loss and reflectance budget, handling, inspection, cleaning, and lifecycle—not popularity alone. This guide breaks down LC, SC, ST, FC, and MPO/MTP connectors to help you decide the best fit for your application. Each connector differs in ferrule size, coupling mechanism, insertion loss behavior, handling convenience, and suitability for specific environments such as FTTH, data centers, industrial. Of the more than a dozen types of fibre-optic connectors available, the four most commonly used today are LC, SC, FC, and ST. LC connectors now lead the market, holding about 36–37% share in 2024 due to their compact size and reliable performance.
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