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FC Fiber Optic Connector Standard

The FC (Ferrule Connector) fiber optic connector is standardized under TIA EIA/TIA-604-4 and IEC 61754-13, designed for high-precision, high-vibration applications.

Overview

The F

C connector is a single-mode fiber optic connector featuring a threaded screw-lock mechanism, which provides a secure, vibration-resistant connection ideal for telecommunications, datacom, and optical test equipment. Originally developed by NTT in Japan during the 1980s, the FC connector uses a 2. 5 mm ferrule made of zirconia ceramic or stainless steel to align the fiber cores precisely.

The threaded coupling nut prevents accidental disconnection and ensures stable optical performance in high-vibration environments. StandardsFC connectors are standardized under: TIA EIA/TIA-604-4 (Fiber Optic Connector Intermateability Standard)IEC 61754-13 (International standard for FC connectors) These standards define the mechanical dimensions, ferrule tolerances, and intermateability requirements to ensure consistent performance across manufacturers. Polish TypesFC connectors are available in different polish types, which affect return loss and insertion loss: FC/PC (Physical Contact): Standard convex polish for low back-reflection.

FC/SPC (Super Physical Contact): Higher polish quality for reduced insertion loss. FC/UPC (Ultra Physical Contact): Ultra-polished for minimal back-reflection. FC/APC (Angled Physical Contact): Ferrule end-face angled at 8° to reduce back-reflection, commonly used in high-precision or analog applications.

Key Features

Threaded coupling: Provides secure, vibration-resistant connections. Ferrule alignment: 2. 5 mm ceramic ferrule ensures precise fiber core alignment.

Tunable versions: Some FC connectors allow ferrule rotation to optimize insertion loss. Applications: Widely used in single-mode lasers, measurement equipment, and polarization-maintaining fibers.

While LC and S

C connectors are more common in modern data centers, FC remains standard in test equipment and high-vibration environments.

Summary

The F

C fiber optic connector is a high-precision, threaded connector standardized under TIA EIA/TIA-604-4 and IEC 61754-13, available in multiple polish types (PC, SPC, UPC, APC) to suit different optical performance requirements. Its secure screw-lock design and precise ferrule alignment make it ideal for telecom, datacom, and optical test applications, particularly where vibration resistance and low back-reflection are critical.

FC Fiber Optic Connector Standard
FC Connector Standards

The FC/PC (Physical Contact) and FC/APC (Angled Physical Contact) fiber optic connectors are standardized under TIA EIA/TIA-604-4 and IEC 61754

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