ST and SC connectors are two common types of fiber optic connectors. The following are ways to differentiate between ST and SC connectors:
1. Connector design
ST connectors have a circular metal or ceramic ferrule at the end of the connector. It has a bayonet twist-lock mechanism that allows the connector to be inserted and secured by twisting the connector into place.
The SC connector has a square plastic or ceramic ferrule. It has a push-pull latching mechanism that allows the connector to be inserted and removed by pushing or pulling the connector body.
2. Ferrule Size
ST connectors have a larger ferrule, usually 2.5 mm in diameter.
SC connectors have a smaller ferrule, usually 1.25 mm in diameter.
3. Connector body size:
The overall size of the ST connector is larger than the SC connector. It is larger and cylindrical in shape.
The overall dimensions of the SC connector are smaller and more compact than the ST connector. It has a rectangular or square shape.
4. Polarity
ST connectors are usually unpolarized, which means they can be inserted in any orientation.
SC connectors have a specific polarity, which means they are designed to be inserted in a specific direction to ensure proper fiber alignment.
5. Common Applications
ST connectors are widely used in older Ethernet networks (such as 10BASE-F and 100BASE-FX), but are less common in modern installations. They are still used in some industrial and military applications.
SC connectors are commonly used in a variety of networking applications, including Ethernet, telecommunications, and data centers. They are typically used with single-mode fiber, but can also be used with multimode fiber.
