What is SC Fiber Optic Connector? October 20th, 2008

SC stands for “Subscriber Connector” or “Square Connector“. It was developed by NTT.

SC connector has a push-pull locking mechanism which is very flexible yet provides high repeatability and low insertion loss. It has been quickly replacing legacy connectors such as ST, SMA connectors and becoming the current most popular fiber connectors used in the fiber optic communication industry.

Because of its push-pull snap-in locking mechanism, SC connector has the advantage in keyed duplexibility to support send/receive channels in a single fiber connection unit.

SC connector uses ceramic ferrules so they can provide accurate fiber alignment and high reliability. The ceramic ferrule is a 2.5mm diameter cylindrical structure and the fiber is fixed in a hole at the center. The typical insertion loss of a SC connector is about 0.2dB.

From outside, the SC connector is an unusual looking square-tipped connector that is slightly cone-shaped at the tip. It uses spring retention to hold the connector in place when mated. This square design and push/pull coupling mechanism make the it usable in high-density applications. Read more..

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