HCH Releases Technical Guide: Fiber Connector Types Explained – LC, SC, MPO & More

author: Jane

2026-03-06

HCH explains common fiber connector types (LC, SC, MPO, FC, ST) and their best use cases in data centers and networks. Get clear guidance to choose the right fiber optic patch cords for your project.

HCH, a professional provider of optical modules and fiber optic connectivity solutions, has recently published a technical guide to help customers better understand different fiber connector types and select the right components for their network systems.The company aims to offer clear, practical knowledge for global users building or upgrading data centers and communication networks.

Why Connector Types Matter

The connector is the part that plugs into your optical module, switch, or patch panel. Using the wrong type means it simply won't fit—like trying to plug a European plug into a US outlet.

1. LC Connector – The Small One

What it looks like: About half the size of SC, with a latch tip that resembles a phone jack. Usually comes as a duplex (two fibers together) for optical modules.

Where you'll find it:

SFP, SFP+, QSFP optical modules
Data center patch panels
Modern network equipment

Best for: High-density environments where space is tight. LC is the most common connector on optical modules today.

2. SC Connector – The Square One

What it looks like: Square-shaped, larger than LC, with a push-pull snap mechanism. Also typically used in duplex pairs.

Where you'll find it:

Older network equipment
Telecom applications
Media converters
Cable TV networks

Best for: Applications where connectors need to withstand frequent plugging/unplugging. SC's sturdy design makes it reliable for long-term use.

3. MPO/MTP Connector – The Multi-Fiber One

What it looks like: A rectangular connector that holds multiple fibers (usually 8, 12, or 24) in a single ferrule. Larger than LC or SC.

Where you'll find it:

High-speed data centers (40G/100G/400G)
Parallel optics applications
Fiber trunk cabling

Best for: Saving space when you need many fibers in one cable. One MPO can replace multiple LC or SC pairs.

4. FC Connector – The Screw-On One

What it looks like: Round with a threaded metal collar that screws into place.

Where you'll find it:

Test equipment
Old telecom installations
Some industrial applications

Best for: Vibration-prone environments where you don't want connectors to pull loose. Less common in modern networking.

5. ST Connector – The Twist-On One

What it looks like: Round with a bayonet-style twist lock (like a camera lens).

Where you'll find it:

Older building networks
Educational institutions with legacy gear
Military applications

Best for: Basically legacy systems. New installations rarely use ST.

Quick Comparison Table

Connector	Size	Common Use	Looks Like
LC	Small	Optical modules, data centers	Tiny square with latch
SC	Medium	Telecom, media converters	Larger square, snap-in
MPO	Large	High-speed data centers	Wide rectangle, multi-fiber
FC	Medium	Test gear, old equipment	Round with screw threads
ST	Medium	Legacy networks	Round with twist lock

Which One Should You Use?

For new network builds: Stick with LC. It's what most modern optical modules use.For data center high-speed links: MPO is your friend for 40G and above.For connecting to existing gear: Check what ports your equipment has, then match accordingly.