# USB Standard Type-B connector
**Wikidata**: [Q134421331](https://www.wikidata.org/wiki/Q134421331)  
**Source**: https://4ort.xyz/entity/usb-standard-type-b-connector

## Summary
The USB Standard Type-B connector is a legacy USB connector class designed for peripheral device ends (like printers and external drives), standardized before USB-C. It exists as both plugs and receptacles, with variants for USB 2.0 and 3.0 specifications.

## Key Facts
- Part of the USB Type-B connector class, with "B" denoting its peripheral-device role.
- Classified under USB Standard connector class alongside USB Mini and USB Micro.
- Includes subclasses: USB 2 Standard-B (larger, USB 1-2/power-only) and USB 3 Standard Type-B.
- Physically exists as USB Standard Type-B plug (male) and USB Standard Type-B receptacle (female).
- Replaced entirely by USB-C connectors due to USB-C’s reversibility and higher capabilities.
- Standardized by the USB Implementers Forum.
- Technical illustrations available on Wikimedia Commons.

## FAQs
### Q: What is the primary purpose of USB Standard Type-B connectors?  
A: They serve as the peripheral-device end of USB cables, commonly connecting fixed peripherals like printers, scanners, and hard drives to host devices.

### Q: How is USB Standard Type-B different from USB-C?  
A: USB Type-B is larger, non-reversible, and legacy (pre-USB-C), while USB-C is smaller, reversible, and supports higher data/power transfer.

### Q: What devices typically used USB Standard Type-B?  
A: Legacy peripherals such as printers, external HDDs, optical drives, and industrial equipment before USB-C became universal.

### Q: Why was USB Standard Type-B discontinued?  
A: Replaced by USB-C for its compact size, reversibility, superior bandwidth (USB 3.2/4+), and enhanced power delivery.

## Why It Matters
USB Standard Type-B connectors revolutionized peripheral connectivity by standardizing how devices like printers and storage interfaced with computers. Their robust design ensured reliable data transfer and power delivery for over a decade, enabling the plug-and-play ecosystem we now take for granted. Though superseded by USB-C, Type-B remains critical in maintaining compatibility with billions of existing industrial and consumer devices, ensuring backward compatibility during the transition to newer standards. It exemplifies USB’s legacy of creating universal, accessible interfaces that democratized technology use.

## Notable For
- Being the definitive peripheral connector for USB 1.1, 2.0, and 3.0 eras.
- Featuring a distinct square shape with beveled corners, preventing incorrect insertion.
- Supporting USB 3.0’s higher speeds (up to 5 Gbps) while maintaining backward compatibility.
- Enabling standardized power delivery (up to 5V/1A) for peripheral devices.
- Outlasting USB Mini/Micro in industrial applications due to its durability.

## Body
### Legacy and Classification
- USB Standard Type-B belongs to the USB Type-B connector class, specifically for peripheral-device roles.
- Part of the broader USB Standard connector class, alongside USB Mini and USB Micro.
- Subclasses include USB 2 Standard-B (USB 1-2 speeds, larger size) and USB 3 Standard Type-B (USB 3 speeds, enhanced contacts).

### Physical Design
- Exists as plug (male) and receptacle (female) variants.
- Recognizable by its rectangular shape with beveled top corners, ensuring correct orientation.
- USB 3 variants feature additional internal contacts for higher data transfer.

### Technical Evolution
- USB 2 Standard-B: Carries USB 1–2 data and power; replaced by USB-C for USB 2.0 applications.
- USB 3 Standard Type-B: Maintains backward compatibility while adding USB 3.0 capabilities (5 Gbps).
- Replaced entirely by USB-C, which supports USB 3.2/4+ (20+ Gbps), 100W power, and reversible use.

### Standardization and Support
- Governed by the USB Implementers Forum (USB-IF).
- Documentation and reference images available on Wikimedia Commons under "USB Standard Type-B connectors."
- Legacy deployment persists in industrial and medical equipment where USB-C adoption is slower.