LC Fiber Connector Explained in Detail

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This video explains LC connector in details regarding its design, size, performance, connector types, and more!

LC connector spec sheet download:

http://www.fiberoptics4sale.com/pdf/L...

In this video, we will show you the basics of LC connector which has been very popular in today's fiber optic networks.

The LC Connector uses a 1.25 mm diameter ferrule. Ferrule is the white cylindrical part here. The ferrule is made of a type of ceramic called zirconia. The LC has very good performance and is highly favored for single mode fiber applications.

The left side picture shows a duplex LC connector.

The right side picture shows a duplex LC to SC patch cable.


This picture shows the size difference between ST, SC, and LC connectors.

ST connector has a cylindrical body and a bayonet locking.

SC connector has a rectangular body and has a push-pull locking. Both ST and SC connector use 2.5mm diameter ferrule which is the white cylindrical part shown here and here.

LC connector is only half the size of a ST or SC connector. It uses a 1.25mm diameter ferrule, the tiny white cylindrical shown here.

In the same space, you can double your fiber connections with LC connector since it occupies only half the size of a SC or ST connector.


There are several types of LC connectors for different applications.

The top row shows simplex LC connectors. The bottom row shows duplex LC connectors.

The connector housing's color represents the connector's type and application. Beige color is multimode connector, blue color is single mode connector, and green color is single mode APC connector. Both regular multimode and single mode connector have a flat face, but the APC connector has a 8 degree angle. APC stands for Angled Physical Contact. APC connector is only for single mode applications.


This drawing shows the typical dimension of a simplex LC connector. The overall dimension is about 30mm by 4.5mm by 4.5mm. This gives you a rough idea of its real size. You can download a LC connector specification sheet at the URL listed above.


LC connector needs bulkhead adapters for mating to each other. The left picture shows simplex and duplex bulkhead adapters. The right picture shows a quad LC adapter which is 4 adapters in one.

The color coding here tells us again that beige color is for multimode fibers and blue color is for single mode fibers.