OM4 vs OM5 Fiber Patch Cable: Key Differences, Performance & Which One to Choose
2nd May 2026
In modern data centers and high-speed networking environments, choosing the right fiber optic cable is critical for performance, scalability, and cost efficiency. Two popular multimode fiber types—OM4 and OM5 fiber patch cables—are often compared when designing high-bandwidth networks.
This guide breaks down the differences between OM4 and OM5, their applications, and which one is best for your network.
What is OM4 Fiber Patch Cable?
OM4 is a laser-optimized multimode fiber (MMF) designed for high-speed data transmission in short to medium distances.
Key Features of OM4:
- Core size: 50/125 µm
- Jacket color: Aqua
- Bandwidth: 4700 MHz·km
- Supports:
- 10G up to 550 meters
- 40G/100G up to 150 meters
- Widely used in:
- Data centers
- Enterprise networks
- Server rooms
OM4 is a proven, cost-effective solution for most high-speed networking needs.
What is OM5 Fiber Patch Cable?
OM5 is the newest generation of multimode fiber, also known as Wideband Multimode Fiber (WBMMF). It is specifically designed for shortwave wavelength division multiplexing (SWDM).
Key Features of OM5:
- Core size: 50/125 µm
- Jacket color: Lime green
- Supports multiple wavelengths (850–953 nm)
- Optimized for:
- SWDM technology
- Higher data capacity over fewer fibers
- Applications:
- Hyperscale data centers
- High-density fiber networks
OM5 allows multiple signals to travel on different wavelengths through a single fiber, increasing efficiency.
OM4 vs OM5: Side-by-Side Comparison
| Feature | OM4 Fiber Cable | OM5 Fiber Cable |
|---|---|---|
| Fiber Type | Multimode | Wideband Multimode |
| Core Size | 50/125 µm | 50/125 µm |
| Jacket Color | Aqua | Lime Green |
| Bandwidth | 4700 MHz·km | Similar (but wavelength-flexible) |
| Wavelength Range | 850 nm | 850–953 nm |
| SWDM Support | ❌ No | ✅ Yes |
| Cost | Lower | Higher |
| Best Use Case | Standard high-speed links | Advanced multiplexing setups |
Key Differences Explained
1. Wavelength Flexibility
OM4 operates primarily at 850 nm, while OM5 supports a wider range (850–953 nm), enabling advanced transmission techniques like SWDM.
2. Capacity & Efficiency
OM5 can carry multiple wavelengths on a single fiber, reducing the number of fibers needed in high-density environments.
3. Cost Consideration
OM4 is more budget-friendly and widely deployed. OM5 is more expensive but can reduce infrastructure complexity in the long run.
When to Choose OM4
Choose OM4 if you:
- Need reliable, cost-effective performance
- Are running 10G, 40G, or 100G networks
- Do not require SWDM technology
- Want a proven industry-standard solution
? Ideal for most businesses and standard data center deployments.
When to Choose OM5
Choose OM5 if you:
- Plan to use SWDM transceivers
- Need higher capacity with fewer fibers
- Are building a future-ready or hyperscale data center
- Want to reduce cable congestion
? Best for advanced, high-density, next-generation networks.
Final Thoughts
Both OM4 and OM5 fiber patch cables deliver high performance, but the right choice depends on your network requirements and budget.
- OM4 = Best value + widely compatible
- OM5 = Future-focused + higher efficiency
For most current deployments, OM4 remains the practical choice. However, if you're planning for next-generation infrastructure, OM5 offers long-term advantages.
