SC vs LC Fiber Connectors: Which One Should You Use?
When building or upgrading a fiber optic network, choosing the right connector is just as important as selecting the right cable. Two of the most widely used connector types in fiber optic installations are SC (Subscriber Connector) and LC (Lucent Connector). Each has its own strengths, physical differences, and preferred use cases. This guide will help you understand the differences and decide which is best for your application.
What is an SC Connector?
The SC connector is a square-shaped push-pull connector known for its simple, durable design. It was one of the first widely adopted connectors in fiber optics and is still used in many networks today.
Key features of SC connectors:
- 2.5mm ferrule
- Push-pull locking mechanism
- Strong and reliable connection
- Common in older network infrastructure and telecom systems
- Often used in patch panels and equipment with larger ports
SC connectors are a popular choice in FTTH deployments, older buildings, and networks where space is not a critical issue.
What is an LC Connector?
The LC connector is a smaller, compact connector that has become the industry standard in modern networks, especially in high-density environments.
Key features of LC connectors:
- 1.25mm ferrule (half the size of SC)
- Latching tab for secure connection
- Ideal for high-density patching
- Common in data centers and enterprise networking
- Often found in SFP transceivers and high-speed switches
LC connectors are widely used in modern installations due to their compact size and reliable performance.
SC vs LC: Side-by-Side Comparison
| Feature | SC Connector | LC Connector |
|---|---|---|
| Ferrule Size | 2.5 mm | 1.25 mm |
| Physical Size | Larger | Compact |
| Locking Mechanism | Push-pull | Latch/tab |
| Typical Use | FTTH, telecom, patch panels | Data centers, switches, SFPs |
| Density Support | Low | High |
| Cost | Slightly lower | Slightly higher |
Which One Should You Use?
The choice between SC and LC connectors depends on your application and space requirements:
- Use SC connectors if you’re working on legacy systems, larger patch panels, or installations where port density is not a concern.
- Choose LC connectors for modern, high-density environments such as data centers or active equipment that requires small form factor connections.
If your project involves both types of equipment, you can also use SC-LC hybrid patch cables to bridge the gap.
Conclusion
Choosing between SC and LC connectors comes down to physical size, port density, and the type of equipment you’re using. Both are reliable and widely supported, but understanding where each excels will help you design a more efficient and scalable network.
