These are the most widely used connectors in telecommunications, data centers, CATV, and broadband networks, designed primarily for single-mode or multimode fibers. Their role is to enable low-loss, low-reflection, and repeatable optical connections.
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Fiber optic movable connectors, also known as fiber optic patch cords, precisely butt the two ends of the fiber with extremely low insertion loss.
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Optical fiber connectors of different interface types can be inserted into both ends of the optical fiber adapter to realize conversion between different interfaces such as FC, SC, ST, LC, MTRJ, MPO,
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SC Fast Fiber Optic Connector (Cold Connector)
The fiber optic cold splice is used when two pigtails are butted together. Its main internal component is a precision v-shaped groove.
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Optical Fiber Pigtail And Patch Cord
Low insertion loss. Ultra low return loss. Multiple connector types available
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ST Optical Fiber Active Connector
ST Optical fiber connector ST is the abbreviation of Stab&Twist, the shell is round, and the fastening method is plug-in card type, that is, card type circular interface.
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SC Optical Fiber Active Connector
SC is one of the most common connected devices in single-mode network devices, and is commonly found on optical terminals. It uses a 2.5mm ceramic core, which is different from ST or FC connectors
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MTRJ Fiber Optic Movable Connector
The MTRJ, as a transceiver integrated square fiber optic connector, consists of two high-precision plastic molded connectors and optical cables. The external parts of the connectors are precision
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LC Fiber Optic Movable Connector
The LC connector is a compact fiber optic connector known for its small form factor (SFF), with a size approximately half that of traditional SC, ST, or FC connectors. Its space-saving design makes
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FC Optical Fiber Active Connector
The FC optical fiber movable connector is a kind of single-core connector commonly used in optical fiber communication. The external strengthening method is metal sleeve and thread fastening
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The E2000 connector series are fiber optic connectors with spring-loaded gates that protect the pins from dust and wear. When the connector is pulled out, the gate closes automatically to reduce
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MU Fiber Optic Active Connector
The MU connector is based on the most commonly used SC connector. Its connector size is about half that of the SC connector and it adopts a push-pull design.
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12-core Multimode Fiber Patch Cord
It supports 40G/100G network connection, has high density and high precision, saves wiring space, greatly improves the convenience of network maintenance, and is widely used in backbone networks,
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What is a Fiber Connector for Communication?
A fiber connector for communication is a standardized optical connector that terminates optical fiber and connects it to another fiber or a transceiver. It ensures:
Precise core alignment
Low insertion loss (IL)
High return loss (RL)
Repeatable connection/disconnection
Main Types of Communication Fiber Connectors
| Connector Type | Ferrule | Polish | Typical Use |
|---|---|---|---|
| SC (Subscriber Connector) | 2.5 mm | UPC/APC | FTTH, PON, CATV |
| LC (Lucent Connector) | 1.25 mm | UPC/APC | Data centers, SFP transceivers |
| FC (Ferrule Connector) | 2.5 mm | APC | Test instruments, long-haul |
| ST (Straight Tip) | 2.5 mm | UPC | Legacy multimode networks |
| E2000 | 2.5 mm | APC | High-performance telecom |
| MTP/MPO | 12–96 fibers | Flat | Parallel optics, data centers |
Characteristics Comparison
| Parameter | SC | LC | FC | ST | E2000 | MTP/MPO |
|---|---|---|---|---|---|---|
| Ferrule Size | 2.5 mm | 1.25 mm | 2.5 mm | 2.5 mm | 2.5 mm | 250 µm/fiber |
| Insertion Loss | ~0.2 dB | ~0.2 dB | ~0.3 dB | ~0.3 dB | ~0.1–0.2 dB | ~0.35–0.75 dB |
| Return Loss (APC) | > 60 dB | > 60 dB | > 60 dB | < 45 dB | > 65 dB | < 30 dB |
| Lock Mechanism | Push-pull | Push-pull | Screw-on | Twist-lock | Push-pull with shutter | Push-latch |
| Density | Medium | High | Low | Low | Medium | Very high |
Purpose and Use Cases
| Use Case | Recommended Connector |
|---|---|
| GPON/FTTH | SC/APC |
| 10G/25G Data Centers | LC/UPC, LC/APC |
| DWDM/CWDM Systems | FC/APC, E2000/APC |
| Patch Panels and ODF | SC, LC |
| Parallel Optics / QSFP | MTP/MPO |
| Test/Measurement | FC, SC (lab-grade, repeatable) |
Solutions and Options
Pre-Terminated Patchcords
SC-SC, LC-SC, LC-LC, FC-LC
Duplex or simplex, SM or MM
With LSZH, OFNR, armored jacket
Field-Installable Connectors (FIC)
No epoxy/no polish (NE/NP) type
Quick-assembly SC/LC for FTTH drops
Hybrid Adapters and Couplers
SC-FC, LC-SC, LC-MU
For cross-platform interoperability
Polishing Styles
| Type | Feature | Use |
|---|---|---|
| PC (Physical Contact) | < -40 dB RL | General use |
| UPC (Ultra PC) | < -55 dB RL | Ethernet, enterprise |
| APC (Angled PC) | < -65 dB RL | FTTH, CATV, PON |
Application Fields
| Industry | Use |
|---|---|
| Telecommunications | GPON, XG-PON, CWDM, DWDM |
| Enterprise Networks | Fiber backbones, SAN, LAN |
| Data Centers | QSFP/LC-MTP parallel optics |
| CATV & Broadcast | SC/APC video signal delivery |
| Government/Military | FC/APC for low-reflection secure systems |
Performance Benchmarks (Typical)
| Metric | Single-mode | Multimode |
|---|---|---|
| Insertion Loss | 0.2–0.3 dB | 0.1–0.3 dB |
| Return Loss (UPC) | > 50 dB | > 30 dB |
| Return Loss (APC) | > 60 dB | N/A |
| Temperature Range | -40°C to +75°C | -10°C to +60°C |
| Mating Cycles | 500–1000 | 500–1000 |
Recommended Manufacturers
| Brand | Specialty |
|---|---|
| Senko | LC/APC, SC, MPO |
| Corning | Field connectors, pigtails |
| US Conec | MTP/MPO assemblies |
| Amphenol | FTTH and outdoor-ready kits |
| Diamond SA | Ultra-high-performance E2000 |
| Rosenberger | High-density, rugged telecom |
Need-Based Selection Examples
| Need | Best Choice |
|---|---|
| Dense data racks | LC Duplex |
| High reflectivity suppression | SC/APC or FC/APC |
| Easy field install | SC Fast Connector |
| Parallel optics 40G/100G | MPO/MTP-12/24 |
| Legacy MM fiber | ST/SC Multimode |
Fiber Connector for Communication vs Other Connectors
| Feature | Communication Fiber Connector | Industrial Fiber Connector | Outdoor Waterproof Connector | High Power Fiber Connector | PM Fiber Connector | Bundle Fiber Connector |
|---|---|---|---|---|---|---|
| Primary Use | Telecom, Data Center | Factory Automation, PLCs | FTTA, Surveillance, Field Deployments | Laser Systems, Medical | Interferometry, Sensing | Imaging, Sensing, Illumination |
| Common Types | SC, LC, FC, ST, E2000 | M12 LC, ODVA LC, TFOCA | ODVA, ODC, Mini-SC | SMA905, QBH, HP-FC/APC | FC/APC Keyed, LC/APC Keyed | MT, D-type Array, Custom V-Groove |
| Fiber Support | SM/MM | SM/MM | SM/MM | LMA, Double-Clad | PM (Panda, Bow-Tie) | SM/MM arrays |
| IP Rating | IP20 (Indoor) | IP65–IP68 | IP67–IP68 | None | None | Varies (typically none) |
| Return Loss (APC) | > 60 dB | > 60 dB | > 60 dB | ~30–40 dB | > 60 dB | ~30–45 dB |
| Insertion Loss | 0.2 dB typical | 0.2–0.5 dB | 0.2–0.5 dB | 0.3–1.0 dB | 0.3–0.5 dB | 0.3–0.7 dB |
| Durability | 500–1000 cycles | 1000+ cycles | 500–1000 cycles | < 500 cycles | < 200 cycles | < 500 cycles |
| Mechanical Strength | Low | High (shock/vibration resistant) | Moderate–High | Moderate | Low (precision alignment) | Low |
| Temperature Range | -10°C to +60°C | -40°C to +85°C | -40°C to +85°C | -10°C to +50°C | Controlled labs | Varies |
| EMI Immunity | Yes | Yes | Yes | Yes | Yes | Yes |
| Installation | Factory or field polish/splice | Rugged field termination options | Plug-and-play waterproof kits | Lab assembly (precision polish) | Cleanroom polish/splice | Factory aligned |
| Typical Jacket | OFNR, LSZH | PUR, Armored, UV | LSZH, PE, UV | Bare fiber, armored, water-cooled | LSZH, tight buffer | Flexible or fused coherent fiber bundles |
Final Tips
Choose SC/LC/FC connectors when working in clean, controlled, telecom environments needing high return loss and low cost.
Use M12/ODVA/ODC connectors for rugged environments, outdoor telecom, or where vibration resistance is critical.
Select SMA or QBH connectors if you're transmitting high optical power (Watts to kW) in laser or medical setups.
Use FC/APC Keyed only if polarization alignment is essential (e.g., fiber optic gyroscopes or interferometers).
Use bundle connectors in medical imaging, sensing, and astronomy, where multiple coherent paths are needed.
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