Basic Definition
LC: Lucent Connector, a small form-factor fiber connector with 1.25mm ceramic ferrule, widely used for SFP/SFP+ optical modules in high-density ports.
UPC / APC refer to fiber end-face polishing types:
- LC UPCFull name: Ultra Physical ContactEnd face: 0° flat with slight convex dome polishing

- LC APCFull name: Angled Physical ContactEnd face: 8° angled bevel polishing

Core Differences
| Item | LC UPC | LC APC |
|---|---|---|
| End-face Angle | 0° vertical convex | 8° angled slope |
| Housing Color | Blue | Green |
| Return Loss (RL) | ≥ -50 dB | ≥ -60 ~ -65 dB |
| Insertion Loss (IL) | 0.2 ~ 0.3 dB | Slightly higher ~ 0.3 dB |
| Reflection Feature | Reflected light returns along the original path | Reflected light deflects into cladding and dissipates |
| Application Scenarios | Data center, enterprise network, multi-mode fiber (OM3/OM4/OM5), general single-mode short/medium transmission | CATV, PON/FTTH, WDM/DWDM, long-haul transmission, reflection-sensitive optical systems |
| Compatibility | Cannot mate with APC directly | Must connect APC to APC only |
Selection Rules
Choose LC UPC (Blue)
- Data center, switch-to-server connection, ordinary fiber transceivers
- OM3/OM4/OM5 multimode fiber links
- Common single-mode links without WDM or analog video signals
Choose LC APC (Green)
- CATV & IPTV broadcast systems
- PON / FTTH fiber access networks
- WDM/DWDM long-distance transmission
- Systems with strict requirements for low reflection and laser service life
Important Note
Do not mix UPC and APC connectors; mismating blue and green connectors will cause severe loss degradation and even damage optical modules. The entire link (patch cord, adapter, device port) must use the same polishing type.
Herramientas y probadores de redes
Cables Ethernet Cat5e
Cables Ethernet Cat6
Cables Ethernet Cat6a
Cables Cat8
Cables Ethernet a granel
Conectores y tomas
Gestión de cables
OS2 Monomodo Simplex
OS2 monomodo dúplex
Fibra multimodo OM3
OM4 multimodo
OM2 multimodo
OM5 multimodo
Cables MTP/MPO
Cables de Conexión Personalizados
Componentes de fibra óptica
Limpiadores y herramientas
Cables DisplayPort
Cables Mini DisplayPort
Cables HDMI
Cables HDMI Mini/Micro
Cables DVI
Cables VGA
Cables de audio
Cables Thunderbolt
Cables USB-C
Cables USB 3.0
Cables de alimentación
Cables SATA
Cables serie
12 Fiber SC UPC Pigtail, 1m G.652.D Single Mode
Verificador de cable de red RJ45 RJ11 VC468 con mando a distancia desmontable
Cable de audio estéreo de 1,8 m y 3,5 mm - M/M
12 Fiber SC APC Pigtail, 1m G.652.D Single Mode
Conector mecánico de montaje en campo LC UPC Simplex, conector de terminación rápida en campo multimodo OM2/OM3/OM4/OM5
LC/UPC Fiber Optic Attenuator, 5dB Fixed, Male to Female 


