Description
Duplex multimode — built for bidirectional data flow
Multimode transceivers always require two fibers: transmit and receive.
The duplex LC structure keeps them locked together, avoiding reversed polarity and simplifying patching inside:
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Server racks
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Switch frames
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Storage networks
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Industrial Ethernet cabinets
In high-density environments, LC duplex allows twice the port count of SC connectors.
2.0mm jacket — flexible but reliable
| Cable size | What it delivers |
|---|---|
| 0.9mm | Splicing, fragile |
| 2.0mm | Live patching, transceivers, panels |
| 3.0mm | Heavy routing |
The 2.0mm cable is optimized for frequent plugging and tight routing behind LC ports, making it the industry standard for active equipment.
Multimode optical performance
| Parameter | Typical value |
|---|---|
| Fiber type | OM2 / OM3 / OM4 multimode |
| Core size | 50/125 µm or 62.5/125 µm |
| Polish | UPC |
| Insertion loss | ≤ 0.30 dB |
| Return loss | ≥ 35 dB |
| Wavelengths | 850 / 1300 nm |
| Durability | ≥ 1000 matings |
These specifications support Ethernet, SAN, and short-reach optical interconnects.
Inside the connector
| Component | Function |
|---|---|
| 1.25mm ceramic ferrule | Precise fiber alignment |
| UPC polished end face | Reduces Fresnel reflection |
| Duplex LC clip | Keeps Tx/Rx in order |
| 2.0mm strain-relief boot | Prevents bending damage |
Professional Q&A
Is multimode suitable for long-distance links?
No. Multimode is optimized for short and medium distances such as inside buildings and data centers.
Can this LC UPC connector be used with APC adapters?
No. UPC and APC must not be mixed — the end faces are different and will be damaged.
Why choose LC duplex instead of simplex?
Because Ethernet and optical modules require two-way transmission, and duplex connectors ensure correct polarity and faster installation.





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