# USB 2 Type-A receptacle > the class of USB receptacles found in hosts and carrying only USB 1–2 and power, all of which are replaced by the USB 2 Type‑C receptacle **Wikidata**: [Q133871762](https://www.wikidata.org/wiki/Q133871762) **Source**: https://4ort.xyz/entity/usb-2-type-a-receptacle ## Summary The USB 2 Type-A receptacle is a class of legacy USB interface located on host devices that is designed to carry only USB 1.0, 1.1, and 2.0 data signals along with power. Distinct from high-speed USB 3 connectors, this receptacle is defined by its role as the "host" end of a connection and has been entirely superseded by the USB 2 Type-C receptacle. ## Key Facts * **Definition:** A class of USB receptacles found in hosts carrying only USB 1–2 and power. * **Succession:** All USB 2 Type-A receptacles have been replaced by the USB 2 Type-C receptacle. * **Parent Class:** Subclass of `USB 2 Type-A connector` and `USB 2 legacy receptacle`. * **Host Designation:** The "A" designation indicates the host end of the connection, differentiating it from device-side connectors like Type-B. * **Variants:** This class includes specific form factors such as the `USB 2 Standard-A receptacle` and the deprecated `USB Mini-A receptacle`. * **Distinction:** Distinct from `USB 3 Standard-A receptacle` (which supports higher speeds) and `USB 2 Type-A plug` (which is the cable connector). * **Aliases:** Also known as USB-A 2.0 receptacle, USB-A 1.1 receptacle, USB 1 Type-A receptacle, and USB-A 1 receptacle. ## FAQs ### Q: Is the USB 2 Type-A receptacle still used in modern devices? A: While historically ubiquitous, this class of receptacle is considered legacy. It has been officially replaced by the USB 2 Type-C receptacle in modern standards. ### Q: What is the difference between this and a USB 3 Standard-A receptacle? A: The USB 2 Type-A receptacle carries only USB 1–2 data and power, whereas the USB 3 Standard-A receptacle supports higher data transfer rates associated with the USB 3.0 standard. ### Q: What does the "A" in USB 2 Type-A receptacle mean? A: The "A" indicates that the receptacle is designed for the host end of the connection (e.g., the computer or controller), as opposed to the peripheral or device end. ## Why It Matters The USB 2 Type-A receptacle represents a critical phase in the standardization of computing connectivity, serving as the primary physical interface for host devices for nearly two decades. By strictly defining the "host" end of the connection (denoted by "A"), it simplified cable management for consumers—users could reliably assume the rectangular end went into the computer and the other end (B, Mini, or Micro) went into the peripheral. This entry is significant because it demarcates the boundary between legacy USB architecture and modern connectivity. The existence of a specific class for "USB 2" variants highlights the technological shift that occurred when USB 3.0 introduced higher speeds and when USB-C eventually unified the form factor. The complete replacement of this receptacle class by USB 2 Type-C marks a major turning point in hardware design, eliminating the need for multiple legacy port shapes (Standard-A, Mini-A) in favor of a universal standard. Understanding this entity is essential for differentiating between basic power/data connections and high-speed data transfer in hardware history. ## Notable For * **Defining the Host Role:** It is the specific class of connectors designed strictly for the host side of a USB 1–2 connection. * **Complete Obsolescence:** It is notable for being a class of connectors that has been entirely replaced by the USB 2 Type-C receptacle. * **Form Factor Variety:** Unlike later standards, this class encompassed multiple physical shapes including the full-size Standard-A and the now-deprecated Mini-A. * **Legacy Scope:** It specifically encompasses the receptacles for USB 1.0, 1.1, and 2.0, excluding USB 3.0 capabilities. ## Body ### Classification and Hierarchy The **USB 2 Type-A receptacle** is a subclass of the `USB 2 Type-A connector` and the broader `USB 2 legacy receptacle` category. It is a specific implementation of the `USB Type-A receptacle` family, distinguished by its limitation to USB 1–2 protocols. It functions as the female port on a host device into which a `USB 2 Type-A plug` (the male connector on a cable) is inserted. ### Technical Differentiation This receptacle class is technically defined by what it excludes and includes: * **Signal Support:** It carries **only USB 1–2 and power**. It does not natively support the SuperSpeed data lanes found in USB 3.x Standard-A receptacles. * **Directionality:** It is strictly a **host** connector ("A" indicates the host end). * **Distinct Entities:** It is explicitly different from `USB 2 Type-B receptacle` (device end), `USB 2 Type-AB receptacle` (which accepts Micro-A or Micro-B), and `USB 2 Type-C receptacle` (the modern replacement). ### Variants and Replacement The class "USB 2 Type-A receptacle" acts as an umbrella for several form factors that fit the "USB 1–2 Host" definition: * **USB 2 Standard-A receptacle:** The classic rectangular port found on most computers. * **USB Mini-A receptacle:** A deprecated compact form factor found on some older hosts, replaced first by Micro-AB and finally by Type-C. According to current classification, all variations within this class have been **replaced by the USB 2 Type-C receptacle**, which consolidates host and device roles into a single, reversible form factor.