USB 3 pinouts and signals. Connector types

USB 3.0 is the third major version of the Universal Serial Bus (USB) standard for interfacing computers and electronic devices. USB 3.0 combines USB 2.0 bus and new SuperSpeed bus with transfer rate up to 5.0 Gbit/s, which is about ten times faster than the USB 2.0 standard. USB 3.0 connectors are usually distinguished from their USB 2.0 counterparts by blue color-coding of the receptacles and plugs.

USB 3.1 is the successor standard (USB 3.1 Gen 2), was released in July 2013 with the new transfer mode SuperSpeed+ that can transfer data at up to 10 Gbit/s (1.25 GB/s, twice the rate of USB 3.0).

Communication is full-duplex during SuperSpeed. In the compatibility mode (USB 1.0 or USB 2.0) communication is half-duplex, with direction controlled by the host.

USB 3 (Type A) pinout

USB3, Type A, Male, Drawing 
USB3, Type A, Male, Example
Pin Name Direction Color Description
1 VBUS   red +5 V power
2 D- «—» white USB 2.0 Data -
3 D+ «—» green USB 2.0 Data +
4 GND   black Ground
5 StdA_SSTX- —» blue SuperSpeed transmitter
6 StdA_SSTX+ —» yellow SuperSpeed transmitter
7 GND_DRAIN   ground Ground
8 StdA_SSRX- «— purple SuperSpeed receiver
9 StdA_SSRX+ «— orange SuperSpeed receiver

USB 3 (Type B) pinout

USB3, Type B, Male, Drawing
USB3, Type A, Female, Example
Pin Name Direction Color Description
1 VBUS   red +5 V power
2 D- «—» white USB 2.0 Data -
3 D+ «—» green USB 2.0 Data +
4 GND   black Ground
5 StdB_SSTX- —» blue SuperSpeed transmitter
6 StdB_SSTX+ —» yellow SuperSpeed transmitter
7 GND_DRAIN   ground Ground
8 StdB_SSRX- «— purple SuperSpeed receiver
9 StdB_SSRX+ «— orange SuperSpeed receiver

USB 3 Micro-B pinout

USB3, Micro, Male, Drawing
Pin Name Direction Color Description
1 VBUS   red +5 V power
2 D- «—» white USB 2.0 Data -
3 D+ «—» green USB 2.0 Data +
4 ID   any OTG ID
5 GND   black Ground
6 StdB_SSTX- —» blue SuperSpeed transmitter
7 StdB_SSTX+ —» yellow SuperSpeed transmitter
8 GND_DRAIN   ground Ground
9 StdB_SSRX- «— purple SuperSpeed receiver
10 StdB_SSRX+ «— orange SuperSpeed receiver