USB Internal Connector
40-Pin USB Front-Panel Connector
The 40-pin USB front-panel connector is a USB-IF desktop reference design that extends the 20-pin internal interface to support two front-panel USB ports.
Related: Key-A 20-Pin · Key-B 20-Pin · USB 3.0 Internal Header
Characteristics
| Document | USB 3.1 / USB Type-C Desktop Front Panel Cable and Connector Implementation Document Rev. 1.1 |
|---|---|
| Pin count | 40 |
| Relationship | Mechanical extension of the 20-pin header/plug design |
| Supported front-panel combinations | Two USB Type-C ports; one USB Type-C plus one Standard-A port; or two Standard-A ports |
| Header variants | Shielded and unshielded reference designs; right-angle headers and cable plugs are allowed |
| Typical use | Desktop motherboard to dual-port modern front-panel USB assembly |
| Specification scope | USB-IF reference design; explicitly not part of the USB base specifications |
| Current status | Published USB-IF internal front-panel implementation interface |
