USB Internal Connector
Key-B 20-Pin USB Front-Panel Connector
The Key-B 20-pin connector is a USB-IF desktop front-panel reference design for linking a motherboard to two Standard-A USB ports.
Related: Key-A 20-Pin · 40-Pin Front-Panel Connector · USB 3.0 Internal Header
Characteristics
Review the Key-B 20-pin design, dual Standard-A port support, header variants, motherboard role, USB-IF reference scope, and current implementation status.
| Document | USB 3.1 / USB Type-C Desktop Front Panel Cable and Connector Implementation Document Rev. 1.1 |
|---|---|
| Pin count | 20 |
| Keying | Key-B; mates only with the corresponding Key-B plug/header |
| Supported front-panel ports | Two Standard-A ports |
| Header variants | Shielded and unshielded reference designs; right-angle headers are allowed |
| Typical use | Desktop motherboard to dual Standard-A 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 |
Key-B 20-pin USB front-panel connector articles
Explore guides about Key-B USB front-panel connectors, motherboard headers, internal cabling, USB ports, and desktop hardware compatibility.
