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USB types

USB connectors come in several types: the default sizes (USB A, USB B and USB C), Mini USB type A and B and Micro USB A and B.

USB A has an elongated, rectangular form and can carry power and data. The USB A plug is used to provide a downstream connection to controllers or hubs.

USB B is narrower, squarer shaped and commonly used for connecting peripheral devices such as printers and scanners, or as an upstream port for USB hubs. USB B connectors are still in use today but slowly being phased out and replaced with USB C connectors and ports.

USB C is the newest USB interface, launched in 2014. With a narrower, more elongated shape than USB A, USB C has more pins enabling it to transfer a larger amount of power and data. USB typc C cable is currently compatible with Apple MacBooks with Thunderbolt 3 ports, Chromebooks and the most recent laptop models.

USB Mini plugs were designed for use on USB peripheral devices such as older smartphone models or digital cameras While still in use on some devices, USB Mini is now broadly seen as a legacy connector, and not certified as compatible with newer devices.

USB Micro is an even slimmer version of the USB mini-plugs, being better suited to newer models of OTG (on-the-go) devices while enabling the same level of connectivity. USB Micro is now the standard connection type for charging smartphones.