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USB 2.0 and USB 3.0 Full Size, Mini and Micro Connectors

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About USB Connectors

USB (Universal Serial Bus) was originally developed and introduced (1996) as a way of setting up communication between a computer and peripheral devices by replacing many varieties of serial and parallel ports.

USB connectors have become the standard connection method for devices such as mice, keyboards, game pads & joysticks, scanners, digital cameras, printers and external hard drives.

Although designed for personal computers USB has become commonplace on other devices such as mobile phones, PDA's, video game consoles, AC power adaptors, memory sticks and mobile internet access dongles.

Mini USB 2.0 - Micro USB 2.0 - Full size USB 2.0 - Full size and Micro USB 3.0

USB evolution
1996 USB 1.0 1.56Mbits/s
1998 USB 1.1 12Mbits/s
2001 USB 2.0 480Mbits/s. This releases included the Mini USB
2007 Addition of micro USB and On-the-Go (OTG) to 2.0 specification GCT developed and added mini & micro USB to portfolio
2008 USB 3.0 5Gbits/s
2010 USB 3.0 Gained traction with xHCI Spec release taken up by Linux community
USB Mini vs. Micro USB Size Comparison
Size comparison
USB Product Life Cycles - USB durability under normal conditions

Two key factors:
Contact design: Major effect on the durability of the spring force, will eventually reduce to a level that will not give good contact. Gold plating: Thicker the gold, longer it takes to wear out.

Number of mating cycles:
USB2.0 Full Size: 1,500 mating cycles, gold flash plating.
USB2.0 Mini: 5,000 mating cycles, 15µ” gold plating.
USB2.0 Micro: 10,000 mating cycles, 30µ” gold plating.
USB3.0 Full Size: 5,000 mating cycles, 30µ” gold plating.
USB 3.0 Micro: 10,000 mating cycles, 30µ” gold plating.

Why Micro types offer better durability?
Accomplished by moving leaf-spring from the PCB receptacle to plug, the most-stressed part is now on the cable side of the connection.
Inexpensive cable bears most wear instead of the µUSB device.


Searching for other USB connectors? View GCT Micro USB connectors, Mini USB connectors, Full size USB, USB2.0 and USB3.0

If you would like more information or would like to request samples, please contact GCT or view all our USB connectors

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