What is the Difference Between USB-C 3.1 and 3.2?

Since the introduction of USB-C and the USB 3.x standard, data transmission and device charging have become faster and more efficient. However, many users—and even some professionals—confuse USB-C with USB 3.1 or USB 3.2, assuming they mean the same thing. In reality, they are two different concepts: one is a connector type, the other is a data protocol standard.

This article clarifies the differences and helps you choose the right cable or port for your application—especially if you're working with a cable manufacturer or sourcing cables for industrial use.

USB-C vs USB 3.1 / 3.2: What's the Difference?

Let’s begin with the basics:

• USB-C is a physical connector type. It’s compact, reversible, and used in many modern devices like smartphones, laptops, and portable SSDs.

• USB 3.1 and USB 3.2 are USB data standards that define how fast data can travel between devices.

In other words, a cable with a USB-C connector can support various USB versions—USB 2.0, USB 3.1, USB 3.2, and even Thunderbolt—depending on the internal wiring and controller.

Understanding USB 3.1 and USB 3.2

USB 3.1

USB 3.1 Gen 1: Offers speeds up to 5 Gbps. This was previously known as USB 3.0.

USB 3.1 Gen 2: Doubles the speed to 10 Gbps and adds improved signal encoding for more efficient data transfer.

USB 3.2

In 2017, the USB-IF (USB Implementers Forum) rebranded existing USB 3.1 standards under the USB 3.2 name:

• USB 3.2 Gen 1 = USB 3.1 Gen 1 = 5 Gbps

• USB 3.2 Gen 2 = USB 3.1 Gen 2 = 10 Gbps

• USB 3.2 Gen 2x2 = New spec supporting 20 Gbps through dual-lane operation (only works with specially designed USB-C cables)

Not All USB-C Cables Are Equal

Although USB-C cables may look the same, their internal specs vary significantly:

• Some USB-C cables only support USB 2.0 speeds (480 Mbps)

• Others support USB 3.2 Gen 2 speeds (10 Gbps)

• Full 20 Gbps (USB 3.2 Gen 2x2) performance requires certified dual-lane USB-C cables

When selecting cables from a cable manufacture partner, make sure to verify both the connector type and the USB generation.

Comparison at a Glance

Choosing the Right Cable for Your Needs

When sourcing cables—especially for industrial or OEM applications—understanding these standards helps you avoid performance issues or compatibility problems.

For high-speed data transfer (e.g., external SSDs, 4K/8K displays):

• Choose USB 3.2 Gen 2 or Gen 2x2 cables with USB-C connectors

For everyday use (charging or general data):

• USB-C with USB 2.0 may be sufficient

For business and industrial use:

• Work with a professional cable manufacture that can guarantee specifications, test results, and long-term reliability

Conclusion

To sum up:

• USB-C is the connector.

• USB 3.1 / 3.2 defines how fast data travels.

• The right combination depends on your application’s data speed, power, and video requirements.

Before you buy or specify cables for production, always check both the connector type and USB standard.

Looking for Custom USB Connectivity Solutions?

At Amissiontech, we specialize in designing and manufacturing high-performance cable harnesses and connector systems—including USB 3.2 Gen 1 and Gen 2 solutions with USB-C interfaces. Whether you need standard or tailored cables for industrial automation, consumer electronics, or high-speed data applications, our R&D-driven team can help you engineer the right solution from concept to production.

Get in touch with Amissiontech today to discuss your cable manufacturing needs.