2025-08-03 11:07:03
🚀 One Minute to Understand: What Do SX, LX, EX, ZX, SR, LR, ER, ZR, DR, FR, LR4 Mean?
(Including 1.25G, 10G, 25G, 40G, 100G, and 400G Optical Modules)
At Sate Optics, we often get asked what those abbreviations like SX, LX, SR, LR4 actually mean when it comes to fiber transceivers.
Here’s a simple cheat sheet covering 1.25G to 400G, helping you quickly understand and choose the right module:
🔹 SFP (1.25G)
| Model | Wavelength | Fiber Type | Distance |
|---|---|---|---|
| SX | 850nm | MMF (OM2) | 550m |
| LX | 1310nm | SMF (OS2) | 10–20km |
| EX | 1550nm | SMF (OS2) | 40km |
| ZX | 1550nm | SMF (OS2) | 80km |
🔹 SFP+ (10G)
| Model | Wavelength | Fiber Type | Distance |
|---|---|---|---|
| SR | 850nm | MMF (OM3) | 300m |
| LR | 1310nm | SMF (OS2) | 10–20km |
| ER | 1550nm | SMF (OS2) | 40km |
| ZR | 1550nm | SMF (OS2) | 80km |
🔹 SFP28 (25G)
| Model | Wavelength | Fiber Type | Distance |
|---|---|---|---|
| SR | 850nm | MMF (OM4) | 70–100m |
| LR | 1310nm | SMF (OS2) | 10km |
| ER | 1310/1550nm | SMF (OS2) | 25–30km |
🔹 QSFP+ (40G)
| Model | Wavelength | Fiber Type | Distance |
|---|---|---|---|
| SR4 | 850nm ×4 | MMF (OM3/OM4, MPO) | 100–150m |
| LR4 | 1310nm ×4 | SMF (OS2) | 10km |
| ER4 | 1310nm ×4 | SMF (OS2) | 40km |
| ZR4 | 1310nm ×4 | SMF (OS2) | 80km |
🔹 QSFP28 (100G)
| Model | Wavelength | Fiber Type | Distance |
|---|---|---|---|
| SR4 | 850nm ×4 | MMF (OM4, MPO) | 100m |
| DR | 1310nm | SMF (OS2) | 500m |
| FR | 1310nm | SMF (OS2) | 2km |
| LR4 | CWDM4 | SMF (OS2) | 10km |
| ER4 | CWDM4 | SMF (OS2) | 40km |
| ZR4 | CWDM4 | SMF (OS2) | 80km |
🔹 QSFP-DD / OSFP (400G)
| Model | Wavelength | Fiber Type | Distance |
|---|---|---|---|
| SR8 | 850nm ×8 | MMF (OM4, MPO) | 100m |
| DR4 | 1310nm ×4 | SMF (OS2) | 500m |
| FR4 | CWDM4 | SMF (OS2) | 2km |
| LR4 | CWDM4 | SMF (OS2) | 10km |
| ZR | DWDM | SMF (OS2) | 80km |
📌 Fiber Type Summary
MMF (Multi-Mode Fiber) → OM2 / OM3 / OM4 – for short-distance connections
SMF (Single-Mode Fiber) → OS2 – for long-distance transmission
MPO/MTP → Multi-fiber push-on connectors used in high-speed modules like SR4, SR8
💬 Still unsure how to choose the right optical module or patch cord?
Reach out to Sate Optics – we’re happy to guide you based on your network needs!
✅ #SateOptics #FiberOptics #OpticalTransceiver #SFP #QSFP #40G #100G #400G #NetworkSolutions #TechTips #DataCenter #Connectivity #KnowledgeShare #PatchCord #MPO #MultimodeFiber #SinglemodeFiber #Telecom
Previous：😆 “Why Compatibility Matters: Not All Optical Transceivers Are Created Equal” 👇
Next：🏆QSFP-DD 400G Optical Transceivers – The Future of High-Speed Connectivity🚀
