USB Connector
USB Micro-A
USB Micro-A is a five-contact plug defined for host-side USB On-The-Go use with compatible Micro-AB receptacles on compact legacy devices.
Characteristics
Review Micro-A's plug-only design, five contacts, USB 2.0 and OTG role, Micro-AB compatibility, legacy status, and replacement by modern USB-C devices.
| Specification name | USB Micro-A plug |
|---|---|
| Connector family | Micro-USB |
| Connector form | Plug |
| Reversible | No |
| Contact count | 5 |
| USB generation | USB 2.0 / USB On-The-Go |
| Mates with | Micro-AB receptacle |
| Typical role | Host-side connection on an OTG device |
| Current status | Legacy and uncommon; USB-IF stopped certifying USB OTG products effective September 2019, and USB-C has replaced this role on modern dual-role devices |
USB Micro-A articles
Explore guides covering USB Micro-A and Micro-USB compatibility, OTG connections, adapters, legacy devices, and common connector questions.
