Type-A 3.0 to Type-B adapter
A USB Type-A (SuperSpeed) plug on one end and a USB Type-B socket on the other. This converts a port rather than carrying a signal any distance, so it is usually a stubby dongle rather than a cable.
USB Type-A (SuperSpeed) — plug
The same rectangle as Type-A, with a blue tongue and five extra pins.
How to recognise it
- Identical outline to a normal Type-A - it is the same plug.
- The plastic tongue is usually blue; teal or red means a faster or always-on port.
- Five extra contacts sit behind the four you can see on a 2.0 plug.
- Maximum speed:
- 5 Gbps, or 10 Gbps on a USB 10Gbps port
- Maximum power:
- 4.5 W standard
USB Type-B — socket
The chunky near-square plug on the back of a printer.
How to recognise it
- Almost square, with the two top corners cut off at an angle.
- About 8 mm across - noticeably deeper than a Type-A.
- Usually white or light grey plastic inside.
- Maximum speed:
- 480 Mbps (Hi-Speed)
- Maximum power:
- 2.5 W standard