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USB-C, USB-B, and USB-A: What’s the Difference?

  • 19 April
Difference between USB-C, USB-B, and USB-A:

For cables and connections, USB is the industry standard. Like other technologies, it has developed throughout time and undergone many revisions, resulting in notable advancements in speed and power. The current form factor, USB-C, represents a major upgrade over USB-A and USB-B. As speeds have improved, so too has the physical architecture of the connections. Daewoo Electronics presents to you an overview of the various USB types and their use cases. 

USB: An Overview

The hardware standard and protocol for digital communications is called USB, or universal serial bus. In other words, the USB standard defines the format of the data that travels via connections and the actual kind of cable. 1996 saw the publication of the original standard.

The title’s universality reveals USB’s main goal. In other words, the primary goal was to standardize computer peripheral power and communication sources. USB-C has just lately brought this universality closer to reality, yet even its early versions significantly enhanced previous connection methods. Users had to deal with a variety of large, unwieldy cables and connections before USB was invented. For example, keyboards and mouse had parallel, serial, VGA, and PS/2 interfaces, but they were not functionally interchangeable.

The fact that USB mixes power and data, thereby eliminating the need for separate power supply for external devices, is one of its main advantages over these earlier connections. To provide a smooth viewing experience, you should daisy-chain your displays.

Additionally, USB interfaces usually don’t need extra settings for input/output addresses, memory access channels, or data speed. As a result, USB devices provide significantly greater interchangeability and hot-swapping capabilities. The USB standard and its current USB-C version are both improving as a result of this flexibility.

What Separates USB-C from USB-B and USB-A?

The form standards for USB connections have undergone many revisions. There were just two varieties of USB at first: USB-A and USB-B. Now that USB-C is in the mix, everything is changing.


The most popular USB type is USB-A. It’s likely that you own several USB-A connections and are acquainted with their appearance. It’s the cable that has an extra broad end. Just one, as both sides of the connection are distinct and do not match in terms of rotational symmetry, each representing a different kind of port.


Similar to USB-A, this is the original name for the two ends of an asymmetric connection. The fact that USB-A and USB-B have different forms contributes to the mono-directional nature of these USB versions. The cable can only be connected in one direction since data transfer is bi-directional but power can only go from the host to the peripheral or receptor end.

In addition, there are USB-A and USB-B small and micro versions, which further complicates matters by requiring separate connections for fundamental use cases and making it harder for consumers to plug devices in for the first time. or the second.

Connectivity Type-C

Overall, USB-C makes things simpler (we’ll go into much more detail about that later). It is totally reversible, so it makes no difference which side you grasp to plug in. Then, because of its bi-directional power capabilities, electricity may flow in both ways, enabling devices to power bigger screens and charge one another. Better data speeds offered by USB-C may also power high-resolution displays. All digital artists who need flawless audio and visual production will greatly benefit from this point. Or anybody else looking for a plug-and-play relationship, for that matter. Having enough screen real estate is also essential for productivity and staying in the workflow, and USB-C delivers on both counts. Putting work aside, USB-C displays provide a superb home theater experience.

We are living in exciting times to see how USB-C may ease our lives and work, and there have been numerous advances. Ensure that you are prepared to fully use it!

 Why Is USB Needed?

Keyboards, mouse, external hard drives, printers, scanners, cameras, and other computer accessories were the first uses for USB. Nonetheless, since their first versions, USB and flash drives have been widely used to link mobile phones and tablets to other devices. Furthermore, in more recent times, USB has developed into a flexible connection for various audio and visual equipment, including webcams, speakers, microphones, and monitors.

It is also possible to utilize USB only for charging because of its dual charging and data transfer capabilities. For fast charging of mobile devices, USB ports are increasingly often encountered on main outlets, converters, and extension leads.

What Upgrades Has USB Seen Over Time?

There are presently four main versions and three kinds of USB. Versions 1.0 through USB 4 are distinguished mainly by their increased speeds. For instance, the first USB 1.0 had a sluggish data rate of 1.5 megabits per second, which increased to 12 megabits per second while operating at maximum speed. With USB 3.2 giving 20 gigabits per second, the data rate has substantially increased over time. Released in 2019, the latest version of the USB4 standard promises an astounding 40 gigabits per second when fully used with USB-C cords.

The directionality of the cable has been improved with USB 3.1, which also marks the release of USB-C. While USB 3.1 added bi-directionality to match the bi-directional connection design of USB-C, earlier incarnations needed unique ends for host and peripheral.

Typically utilized at the host end of the connection, USB-A has a narrow, rectangular cross-section. Therefore, gaming consoles, media players, laptops, and desktop computers may all have USB-A connectors. The first USB-B was square in shape, with top corners beveled, and it was used to connect peripherals like external hard drives and printers.

With USB 2.0, smaller USB-A and USB-B variants were introduced. For connecting smaller devices like tablets and smartphones, they are more practical in their mini and micro forms. But there’s a problem: the connections on USB-A and USB-B (original, mini, and micro) aren’t rotationally symmetrical. Because it’s not always clear from the plastic enclosure which side is which, this might make attaching difficult.

What Are The Benefits Of USB-C?

The USB-C standard has more features than its predecessors, but one of its main benefits is that it supports the significantly greater transfer speeds of USB 3.2 and upwards. Initially, USB-C offers complete bidirectional functionality. In the simplest terms possible, this indicates that host and receptor are interchangeable since both ends of the cable are physically identical.

The range of previous sizes for both USB-A and USB-C is eliminated by USB-C as well. It is compatible with a wide range of devices, from tiny mobile phones and tablets to bigger visual displays, since it is just marginally larger than the preceding micro-B connection. Users may keep fewer cords because of USB-C cables’ high degree of interchangeability due to their simplicity. Ports for desktops and laptops may, of course, be made simpler.

Because USB-C is reversible, it can charge devices in both directions, which means that any gadget may theoretically be charged from any other device. Not only do older USB cables not enable the same degree of charging, but their directionality is also an issue. But a laptop and other bigger gadgets may now be powered by USB-C. Larger devices can now easily handle 100 watts and 20 volts via USB-C, while USB-A could only handle 2.5 watts and 5 volts.

Pass-through charging, which functions as a USB hub that charges other devices and powers laptops concurrently, is one of the useful advantages of this. Furthermore, portable USB-C chargers are compatible with laptops, Interactive flat panel display, etc. providing more mobility while on the go.

Does USB-C Have Any Drawbacks?

Since USB-C is a relatively new technology, there have been certain problems. An obvious danger of introducing a universal solution into a complex ecosystem is that some early users complained that the standard is attempting to accomplish too much for all devices. Since USB-C is a standard, real implementations could differ and might not support every possible way to operate.

These teething issues are, nonetheless, uncommon nowadays. Initial problems have been worked out, and the IT community is always eager to embrace the future. The widespread use of it shows support for USB-C.

Technology like USB-C looks ahead. There is still an opportunity for improvement since it contains capability for creating new communication protocols. Though there has been a lot of uncertainty over the last 20 years about USB-C, USB-B, and USB-A variances, it seems like USB-C will clear things up going forward.

It is critical to understand that USB-C will probably be the port of the future as we utilize more and more gadgets from Daewoo India in our daily lives, whether for work, education, or leisure.