Common Fibre Optic Connector Types

LC (Lucent Connector) – A Lucent connector (LC) is a connector with a 1.25 mm ferrule, half the size of an SC or ST connector. LC connectors are frequently used as their small footprint makes them ideal for high-density installations. Similarly, SFP (small form-factorable pluggable) modules and fiber optic extenders often require these connectors, although this varies by manufacturer. LC connectors, again, are smaller in size and feature a clip design.

SC (Subscriber Connector) – A 2.5 mm snap-in connector. This was the first connector chosen for the TIA-568 standard and is a snap-in connector that latches with a simple push-pull motion. SC connectors, as noted above, are larger than LC connectors. SC connectors are used with some styles of fiber optic extenders, although LC tends to be more common.

ST (Straight Tip) – A ST connectors is a 2.5 mm AT&T™-designed connector. It has a bayonet mount and a long cylindrical ferrule to hold the fiber. Most ferrules are ceramic, but some are metal or plastic.

MTRJ (Mechanical Transfer Registered Jack) – The single polymer ferrule duplex MT-RJ connector includes alignment. It is available in female / male connectors, or a plug-and-jack format.

MU (Minatare Unit) – MU Connectors have a reduced footprint and are new generation connectors used mainly in dense applications. The connector is square and employs a push-pull mating mechanism.

E2000 – Modern day telecommunication networks increasingly make use of E2000 connectors. The inclusion of an integrated spring-loaded shutter is a unique feature of this connector. It protects the ferrule from dirt, dust and scratches. As this connector uses a monobloc ceramic ferrule, problems associated with different co-efficient of expansion are eliminated. The E2000 is a latched push-pull locking connector.