# USB Type-A receptacle

> a class of legacy USB receptacles that preceded USB-C (“A” indicating the host end)

**Wikidata**: [Q133871445](https://www.wikidata.org/wiki/Q133871445)  
**Source**: https://4ort.xyz/entity/usb-type-a-receptacle

## Summary
The USB Type-A receptacle is a class of legacy USB receptacles that served as the host-end connection point, preceding USB-C and identified by the "A" designation. It has been universally replaced by the USB-C receptacle in modern devices.

## Key Facts
- It is a class of legacy USB receptacles preceding USB-C, with "A" indicating its role as the host end.
- Replaced entirely by the USB-C receptacle, which now serves as the universal standard.
- Functions as a subclass of both USB Type-A connector and legacy USB receptacle classes.
- Distinct from USB Type-A plug (male connector), USB Type-B receptacle (peripheral), USB Type-AB receptacle (On-The-Go), and USB-C receptacle.
- Related to legacy variants including the USB Mini-A receptacle (deprecated compact version) and USB 3 Standard-A receptacle.
- Common aliases include USB-A receptacle, USB Type-A port, and USB-A port.
- Illustrated in Wikimedia Commons under the category "USB Type-A receptacles."
- Features a standardized image at: https://commons.wikimedia.org/wiki/Special:FilePath/USB_connector_illustration,_to_scale,_grouping,_legacy,_Type-A_receptacles.svg.

## FAQs
### Q: What does the "A" in USB Type-A signify?
A: The "A" indicates it is the host-end receptacle, typically found on computers and chargers rather than peripheral devices.

### Q: Why is USB Type-A being replaced by USB-C?
A: USB-C offers reversible insertion, higher data transfer speeds, improved power delivery, and a single universal standard that consolidates all USB connector types.

### Q: Is USB Type-A still compatible with modern devices?
A: It remains usable in legacy devices but has been superseded by USB-C in new hardware, which supports backward compatibility through adapters.

## Why It Matters
The USB Type-A receptacle standardized host-device connections for decades, enabling universal interoperability across billions of peripherals. Its rectangular, non-reversible design became iconic in computing history, democratizing device connectivity. As the foundational USB receptacle for USB 1.0 through USB 3.x standards, it established the host-peripheral model that defined USB ecosystems. Though replaced by USB-C, its legacy persists as the longest-serving USB interface, underscoring its role in enabling the "plug-and-play" revolution that shaped modern consumer electronics.

## Notable For
- Served as the exclusive USB host-end connector for over two decades across all major USB versions (1.0–3.x).
- Established the rectangular, non-reversible form factor that became synonymous with USB interfaces.
- Unified device connectivity by replacing proprietary ports with a standardized host-end solution.
- Featured dedicated variants like USB 2 Type-A (for 1–2 power/data) and USB Mini-A (for compact devices).
- One of the first universally adopted connector standards to achieve near-total industry adoption.

## Body
### Definition and Classification
The USB Type-A receptacle is a class of legacy USB receptacles that preceded USB-C. Its "A" designation specifies its role as the host end in USB connections, distinguishing it from peripheral-side connectors. It is classified as a subclass of both USB Type-A connector and legacy USB receptacle.

### Related Entities
- **USB Mini-A receptacle**: A deprecated compact variant of USB Type-A, limited to USB 1–2 power and data, replaced by USB Micro-AB and ultimately USB-C.
- **USB 3 Standard-A receptacle**: A legacy receptacle for USB 3.x specifications, maintaining the Type-A form factor with enhanced capabilities.
- **Distinctions**: It differs fundamentally from USB Type-A plug (male connector), USB Type-B receptacle (peripheral end), USB Type-AB receptacle (On-The-Go dual-role), and USB-C receptacle (modern reversible standard).

### Replacement Status
Completely replaced by the USB-C receptacle, which consolidates all USB receptacle types into a single, reversible interface. USB-C specifically addresses Type-A’s limitations by supporting higher power delivery (up to 240W), data speeds up to 40Gbps, and bi-directional power flow.

### Representation
- **Image**: Illustrated at https://commons.wikimedia.org/wiki/Special:FilePath/USB_connector_illustration,_to_scale,_grouping,_legacy,_Type-A_receptacles.svg.
- **Commons Category**: Cataloged under "USB Type-A receptacles" on Wikimedia Commons.
- **Aliases**: Recognized interchangeably as USB-A receptacle, USB Type-A port, or USB-A port.