Description
3.0mm jacket — when the cable itself becomes part of system reliability
A 3.0mm duplex jumper is not simply “thicker”.
It uses a stronger aramid yarn layer, larger buffer and reinforced boot, which dramatically increases its mechanical safety margin.
| Jacket size | Real-world meaning |
|---|---|
| 2.0mm | For rack-to-rack and device ports |
| 3.0mm | For backbone routing, floor ducts, cabinet jumpers |
This makes the 3.0mm duplex APC LC especially suitable for metro fiber rooms, CATV hubs, and telecom distribution frames.
APC geometry for reflection-critical systems
The angled physical contact prevents reflected light from re-entering the fiber core.
| Optical performance | Typical value |
|---|---|
| Fiber type | Single-mode 9/125 µm |
| Polish | APC (8°) |
| Insertion loss | ≤ 0.30 dB |
| Return loss | ≥ 60 dB |
| Working wavelengths | 1310 / 1490 / 1550 nm |
| Durability | ≥ 1000 matings |
This reflection control is essential for RFoG, CATV overlay, GPON and long-haul DWDM links.
Duplex structure for true bidirectional transmission
The duplex LC format locks two fibers together in one connector body, ensuring:
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Stable Tx/Rx alignment
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Faster installation
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Lower risk of polarity errors
Even when cables are heavily routed through cable trays, duplex APC LC keeps both channels protected and synchronized.
Engineering details
| Component | Function |
|---|---|
| 1.25mm zirconia APC ferrule | Maintains precise 8° angle |
| Reinforced duplex clip | Holds both fibers securely |
| Thick 3.0mm jacket | Absorbs pulling force |
| Long-life APC polish | Keeps return loss stable over time |
Professional Q&A
Is 3.0mm too thick for LC adapters?
No. Only the cable is thicker. The LC ferrule and housing remain standard and fit all LC APC adapters.
When should I choose 3.0mm instead of 2.0mm?
When patch cords are routed through ducts, cabinets, or shared trays where they can be bent or pulled.
Does APC really matter for backbone links?
Yes. In long single-mode paths with splitters, amplifiers or RF signals, reflections quickly accumulate and APC prevents that.
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