How Many Fiber Optic Connector Types Do You Know?

Sweetlittledollar
5 min readDec 22, 2023

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The fiber optic connector, available in diverse configurations and types, holds significant importance as a key component in the realm of fiber optic cables. Broadly, various types of fiber optic cable connectors can be classified based on standards such as utilization, fiber count, fiber mode, transmission method, transmission media, boot length, polishing type, and termination method.

Utilization: Fiber Connectors Connect with Adapter Panel

The following fiber connector types require an adapter panel when connecting. Fiber cables with these optical connector types are usually used in data centers, telecom rooms, enterprise networks and so on.

LC Connector

The Lucent Connector (LC), categorized as a Small Form Factor (SFF) connector, features a 1.25 mm ferrule. Its compact design has propelled these fiber optic connectors to widespread popularity in data communications, particularly for high density applications. The move towards high efficiency cabling is evident, with many opting for LC fiber connectors. Currently, the LC fiber optic connector stands out as the most widely utilized connector in various applications.

SC Connector

The SC fiber connector was the initial choice for the TIA 568 standard and is recognized as a snap in connector that securely latches through a straightforward push pull motion. The “SC” designation originates from its “Square Connector” design, characterized by a square shaped connector body. Featuring a 2.5mm ferrule — double the size of the preceding LC connector — the SC fiber optic connector finds optimal use in data communications and telecommunications applications, including point to point and passive optical networking. Thanks to its outstanding performance, the SC fiber optic connector remains the second most prevalent choice for applications requiring polarization maintaining capabilities.

MTP/MPO Fiber Connector

In contrast to the preceding two fiber optic connectors, the MTP/MPO fiber connector distinguishes itself as a multi fiber connector, surpassing others in size. This connector consolidates fibers, ranging from 12 to 24, within a single rectangular ferrule. Primarily employed in 40G and 100G high bandwidth optical parallel connections, the MTP/MPO fiber connectors present complexities arising from key up and key down orientations, as well as distinctions between male and female connectors.

ST Connector

The ST (Straight Tip) fiber optic connector, developed and licensed by AT&T shortly after the introduction of the FC type, features a ceramic, spring loaded 2.5mm ferrule secured in place by a half twist bayonet mount. This connector is commonly employed in both long and short distance applications, such as campus and building multimode fiber installations, corporate network environments, and military applications.

FC Connector

“FC” stands for Ferrule Connector. The FC fiber optic connector stands out as the first optical fiber connector to incorporate a ceramic ferrule. Diverging from the plastic bodied SC and LC connectors, the FC connector adopts a round screw type fitment crafted from nickel plated or stainless steel. To ensure proper insertion, the FC fiber optic connector utilizes an alignment key, subsequently securing itself into the adaptor/jack through a threaded collet. Despite the added complexity in both manufacturing and installation, FC connectors continue to be preferred in precision instruments like OTDRs and remain a choice for single mode fiber applications. Initially designed for data communications and telecommunications, FC connectors have seen reduced use since the introduction of SC and LC fiber optic connectors. Over recent years, the usage of both ST and FC connectors has experienced a decline.

MT RJ Connector

The Mechanical Transfer Registered Jack (MT RJ) connector is a duplex connector featuring both male and female versions that utilize pins for alignment. Crafted with a plastic housing, these connectors ensure precise alignment through the use of metal guide pins and plastic ferrules. Notably smaller than a standard phone jack, the MT RJ connector offers ease of connection and disconnection. Furthermore, it presents advantages such as a lower termination cost and increased density for both electronic equipment and cable management hardware when compared to other single fiber termination options.

MU Connector

Resembling a miniature SC connector with a 1.25mm ferrule, the MU fiber optic connector boasts a straightforward push pull design and a compact, miniature body. It finds application in compact multiple optical connectors and incorporates a self retentive mechanism designed for backplane applications.

DIN Connector

The DIN connector is characterized by its round shape, featuring pins arranged in a circular pattern. This connector type accommodates various cables that plug into an interface, facilitating the connection between devices. A standard sized DIN connector typically ranges from three to 14 pins, with a diameter of 13.2 millimeters. Its applications extend to various devices, including PC keyboards, MIDI instruments, and other specialized equipment.

E2000 Connector

The E2000 Connector employs a push pull coupling mechanism featuring an automatic metal shutter within the connector to safeguard against dust and laser beams. Its one piece design allows for quick and effortless termination, making the E2000 fiber optic connector well suited for applications demanding high safety and high power.

Utilization: Fiber Connectors Connect Without Adapter Panel

Compared to the above fiber optic connector types, Rosenberger Q RMC and NEX10 connector adopt push pull quick locking mechanism, which can realize quicker connection without using an adapter panel. They are designed for harsh environment use.

Rosenberger Q RMC Connector

Q RMC, which stands for Rosenberger Multifiber Connector, represents a robust industrial connector equipped with the multi fiber MT ferrule found in the MTP®/MPO connector, capable of accommodating 24 fiber cores. This compact connector boasts a push pull closing mechanism, simplifying and expediting optic connector connections, especially in confined spaces, thereby reducing installation times and associated costs. The Q RMC connector meets the requirements for protection class IP67, ensuring waterproof, dustproof, and corrosion resistant capabilities.

Moreover, the Q RMC connector is well suited for deployment in areas with extreme temperatures, as its operating and storage temperature ranges from 40 to 80℃. This makes fiber cables with Q RMC connectors ideal for various applications, including industrial sites, minefields, mobile communication (FTTA), 5G Base Stations, broadcast setups, smart grid cabling, and more.

Rosenberger NEX10 Connector

The Rosenberger NEX10 connector is designed for use in challenging outdoor environments, featuring a compact size along with waterproof, dustproof, and anti corrosion properties. This connector offers versatility with both screw type and push pull locking mechanisms. The push pull quick lock ensures secure installation and effortless removal without the need for additional tools. Alternatively, the screw type plug employs a screw locking mechanism, providing a robust and secure connection between the plug and socket.

Check out all of our fiber optic cable connectors options to find what you need and contact GUOYUAN ELECTRONICS for more imformation.

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