The ST LC connector is a type of fiber optic connector used in telecommunications. It is a small form factor connector that is used to connect two fiber optic cables together. It is a push-pull type connector that is easy to install and provides a secure connection. The ST LC connector is a popular choice for high-speed data transmission due to its low insertion loss and high return loss. It is also resistant to dust and moisture, making it suitable for outdoor applications. The ST LC connector is available in both single-mode and multi-mode versions, making it a versatile choice for a variety of applications.