USB Connector
Micro-USB
Micro-USB is a small, non-reversible USB connector family widely used before USB-C, with USB 2.0 and wider SuperSpeed forms.
Characteristics
| Official connector family | USB Micro-A, Micro-B, Micro-AB, SuperSpeed Micro-A, SuperSpeed Micro-B, and SuperSpeed Micro-AB |
|---|---|
| Reversible | No |
| Contact count | 5 in USB 2.0 Micro forms; 10 in SuperSpeed Micro forms |
| USB 2.0 support | Yes |
| USB 3.x support | Yes, through the wider SuperSpeed Micro forms |
| USB4 support | No; USB4 uses USB Type-C |
| Typical connector role | Micro-B was commonly device-facing; Micro-A and Micro-AB supported USB On-The-Go roles, with corresponding SuperSpeed forms for USB 3.x OTG |
| Typical devices | Older phones, tablets, cameras, controllers, accessories, external drives, and compact peripherals |
| Speed identification | USB 2.0 Micro forms do not identify one data rate; SuperSpeed Micro forms are physically wider and add SuperSpeed contacts |
| Current status | Legacy; USB-IF ended OTG product certification effective September 2019 and ended USB 3.x Micro-B and Micro-AB connector certifications after February 28, 2021 |
