Side-by-Side Comparison
Fiber Connectors
FC vs. LC
Comparing 2 standards across 9 specifications. 8 key differences identified.
Comparing:
FC
LC
The FC connector (Ferrule Connector / Fiber Channel, TIA-604-4 / FOCIS-4) is a heavy-duty optical connector designed by NTT. Utilizing a 2.5 mm ceramic ferrule inside a threaded round nickel-plated metal coupling nut, it provides extreme mechanical retention in high-vibration environments and optical test instrumentation.
The LC connector (Lucent Connector, TIA-604-10 / FOCIS-10) is a small form-factor (SFF) optical connector utilizing a 1.25 mm ceramic ferrule and an RJ45-style push-pull latching clip, widely used in enterprise datacenters and optical transceivers (SFP/SFP+/SFP28).
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
Standard / FOCIS
|
TIA-604-4-B (FOCIS-4) / IEC 61754-13 | TIA-604-10-B (FOCIS-10) / IEC 61754-20 |
|
Ferrule Diameter
|
2.5 mm | 1.25 mm |
|
Ferrule Material
|
Zirconia ceramic | Zirconia ceramic |
|
Latching Mechanism
|
Threaded screw-on metal coupling nut | Push-pull with retention clip (RJ45-style) |
|
Fiber Modes Supported
|
Single-Mode (OS2) and Multi-Mode | Single-Mode (OS1/OS2) and Multi-Mode (OM1–OM5) |
|
Typical Insertion Loss
|
0.15–0.30 dB | 0.10–0.25 dB |
|
Polish Types Available
|
UPC (Flat metal body) and APC (Step-keyed / cone body) | UPC (Ultra Physical Contact, Blue) and APC (Angled, Green) |
|
Keying Mechanism
|
Adjustable / fixed alignment key | — |
|
Duplex Clip Pitch
|
— | 6.25 mm |