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USB Connector Types: A Complete Guide (Type A, Type C and More)
Types of USB connectors: a quick guide to choosing the right one
Although we all call them "USB," not all USB connectors are the same. Some are only for charging, others allow for fast data transfer, and some can even output video to a monitor via an adapter. In this guide, we explain the differences between USB-A, USB-B, Mini USB, Micro USB, and USB-C, so you know which cable or adapter you need in each case.
Quick Summary
- USB-A: The classic rectangular connector for computers, chargers, and hubs.
- USB-B: Common in printers, scanners, and some audio equipment.
- Mini USB: Used in older cameras, GPS, and devices predating Micro USB.
- Micro USB: Very common in older Android phones, controllers, power banks, and accessories.
- USB-C: The modern reversible connector; can be used for charging, data, video, and docking, depending on the device.
Choose your USB cable in 30 seconds
Start by identifying the connectors on both devices. Then check the required speed and charging power, and whether you need video output. These are the most common options currently available from TiendaCables:
- USB-C to USB-A: for connecting a USB-C device to a computer or charger with a USB-A port. View USB-C to USB-A 3.0 cable.
- USB-A to USB-B: the usual choice for printers, scanners and professional equipment. View USB-A to USB-B cable.
- USB-C to USB-C: for fast data transfers and charging up to 100 W when both devices are compatible. View 20 Gbps, 100 W USB-C cable.
- USB-A to Micro USB: for accessories, controllers, cameras and older devices. View Micro USB cable.
- One USB-C connection for displays, networking and peripherals: use a dock if you need HDMI, RJ45, USB-A and Power Delivery. View 6-in-1 USB-C dock.
Still unsure? View all USB cables and adapters or continue reading the explanation of each connector.
USB-A: The classic connector
USB Type-A is the rectangular connector found on many computers, chargers, televisions, consoles, USB hubs, and power strips with USB charging. For years, it has been the standard for connecting peripherals such as keyboards, mice, printers, USB drives, and external hard drives.
Its main advantage is compatibility: many devices still use USB-A. Its disadvantage is that it is not reversible, so it only fits in one position.
When you need a USB-A cable or adapter
- To connect classic peripherals to your computer.
- To charge phones or accessories from a USB-A charger.
- To use USB drives, keyboards, mice, or external hard drives.
- To adapt a modern USB-C device to an older USB-A port.
USB-B: Printers, scanners, and professional equipment
USB Type-B is more square and is typically used in devices that are not moved around as much, such as printers, scanners, audio interfaces, MIDI controllers, or some professional equipment.
It is not as common in modern mobile phones or laptops, but it remains important because many office equipment and industrial devices continue to use it.
When you need USB-B
- To connect a printer or scanner to your computer.
- For audio equipment, MIDI, or controllers.
- To replace a lost or damaged printer cable.
Printer cable: which one you need
- Computer with USB-A: USB 3.0 A male to B male cable, available in various lengths. Also compatible with USB 2.0 ports.
- Laptop with only USB-C: USB-C to USB-B printer cable, 2 m, no intermediate adapters needed.
The USB-B printer connector hasn't changed in twenty years: whether your printer is from 2005 or 2025, the square end is the same.
Mini USB and Micro USB: small connectors still very much present
Before the arrival of USB-C, many small devices used Mini USB or Micro USB. Although they are less and less common in new devices, they are still prevalent in controllers, cameras, GPS, power banks, Bluetooth speakers, headphones, and electronic accessories.
Mini USB
Mini USB was common in digital cameras, MP3 players, GPS, and some older external hard drives. It is larger than Micro USB and less common today. If you need to retrieve one of these devices, the USB-A to Mini USB 5-pin cable is the standard used by practically all of them.
Micro USB
Micro USB was for many years the standard for Android phones and accessories. If you have an old device that charges with a small non-reversible connector, it is likely Micro USB. For equipment that you connect and disconnect daily, the magnetic Micro USB cable prevents port wear, which is the most common failure of this connector.
USB-C: The modern and reversible connector
USB-C is the connector that is becoming standard in mobile phones, tablets, laptops, monitors, chargers, and docks. Its most visible advantage is that it is reversible: it can be connected in either position.
But the most important thing about USB-C is not just its shape. Depending on the device and the cable, USB-C can be used for:
- Charging mobile phones, tablets, and laptops.
- Transferring data.
- Connecting displays via DisplayPort Alt Mode or Thunderbolt.
- Using hubs, docks, HDMI, VGA, RJ45 adapters, or card readers.
Important: Not all USB-C ports do the same thing
This is one of the most common mistakes. Two USB-C ports can have the same shape but different capabilities. Some only charge and transfer basic data; others allow video, fast charging, or connection to docking stations.
For example, to use a USB-C to HDMI adapter, your laptop or mobile phone must support video output via USB-C using DisplayPort Alt Mode or a compatible technology. If it doesn't support it, the adapter may be fine, but still won't provide an image.
Video output via USB-C: three ways
- One cable, no adapters: USB-C to HDMI cable, 2 m, 4K at 30 Hz. The cleanest option if you only need the screen.
- Reuse your HDMI cable: compact USB 3.1 to HDMI converter, small and easy to carry in your backpack.
- Complete workstation: 6-in-1 USB-C dock. A single cable to your laptop for display, network, and peripherals.
In all three cases, the requirement is the same: the computer's USB-C port must support video output (DisplayPort Alt Mode or Thunderbolt).
See also: guide to choosing a USB-C adapter for laptops.
USB 2.0, USB 3.0, USB 3.1, USB 3.2, and USB4: speed differences
In addition to the connector type, there is also the USB standard version. This primarily affects transfer speed and, in some cases, charging power or advanced features.
| Standard | Approximate Speed | Typical Use |
|---|---|---|
| USB 2.0 | Up to 480 Mbps | Keyboards, mice, printers, basic charging |
| USB 3.0 / 3.1 Gen 1 | Up to 5 Gbps | External drives, fast memory, hubs |
| USB 3.1 Gen 2 / 3.2 | Up to 10-20 Gbps | Fast transfer, docks, professional devices |
| USB4 | Up to 40 Gbps | Video, high-speed data, advanced docks |
For simple tasks like connecting a keyboard, a USB 2.0 cable may suffice. For external drives, fast hubs, video, or docking, it's worth checking the cable and port versions carefully.
How to choose the correct USB cable
To choose wisely, don't just look at the connector's shape. Also, consider the use you need:
- Charging only: Check the connector type and the power the cable supports.
- Data transfer: Check if you need USB 2.0, 3.0, 3.1, 3.2, or USB4.
- Connecting a display: Make sure the device supports video over USB-C.
- Using adapters: Confirm if you need HDMI, VGA, RJ45, a card reader, or a complete dock.
- Legacy compatibility: You may need USB-A to Micro USB, USB-A to USB-B, or USB-C to USB-A.
Purchase Recommendation
If you're unsure, first identify the device's connector and then consider its use. These cover most cases:
- Printer or scanner: USB A to USB-B cable.
- Camera, GPS, or older equipment: USB-A to Mini USB cable.
- Daily use Micro USB accessory: magnetic Micro USB cable.
- USB-C laptop to monitor or TV: USB-C to HDMI cable.
- Telework setup: 6-in-1 USB-C dock.
Frequently asked questions about USB connectors
Are USB-A and USB-C the same?
No. USB-A is the classic rectangular connector, while USB-C is smaller, reversible, and can support more advanced functions depending on the device and cable.
Do all USB-C cables work for charging laptops?
No. To charge laptops, you need a USB-C cable compatible with the appropriate power, typically via USB Power Delivery. A basic USB-C cable can charge a phone, but not necessarily a laptop.
Do all USB-C ports allow for connecting a monitor?
No. To connect a monitor via USB-C, the device's port must support video output, such as DisplayPort Alt Mode or Thunderbolt. If the port doesn't support it, a USB-C to HDMI converter will not provide an image even if it is in perfect condition.
What's the difference between Micro USB and USB-C?
Micro USB is older, non-reversible, and typically more limited in charging and speed. USB-C is reversible, modern, and can support fast charging, high-speed data, and video, depending on the equipment.
Can I use a USB-C to USB-A adapter?
Yes, in many cases, it works to connect USB-A peripherals to a USB-C device. However, speed and functions will depend on the adapter, cable, and the device's port.
How do I know which USB cable I need?
First, look at the physical connector on your device, and then consider the use you need: charging, data, video, or connecting to a peripheral. If you have any doubts, you can contact TiendaCables to find the correct cable or adapter.
Conclusion
USB connectors can seem confusing because they combine two distinct things: the connector shape and the version or capability of the USB standard. USB-A, USB-B, Micro USB, and USB-C do not have the same applications, and within USB-C, there can be significant differences between charging, data, and video.
If you're looking for a cable to charge, transfer data, connect a printer, use a laptop adapter, or set up a workstation, check out our selection of USB cables and adapters.