USB 2.0 (USB-IF)

USB 2.0 Type-A Standard 4-Pin Plug and Receptacle Pinout

The USB 2.0 Standard-A connector carries bus power, one differential data pair and ground on four contacts. Select a contact to see its signal and role.

Pin assignment

Power
USB data
Ground

Schematic face view, not to scale · numbering per USB 2.0 (USB-IF)

Pin assignment of USB 2.0 Standard-A Connector
Signal	Function	Status
VBUS	+5 V bus power: up to 500 mA (five unit loads) from a high-power port, 100 mA from a low-power port	Standard
D-	USB 2.0 differential data, negative half	Standard
D+	USB 2.0 differential data, positive half	Standard
GND	Ground return	Standard

Pin details

Select a pin on the diagram or table for full details.

About this connector

Four-contact USB 2.0 Standard-A connector with VBUS, differential D-/D+ data, and ground.

Specifications

Standard: USB 2.0 Type-A
Positions: 4

Primary sources

Universal Serial Bus Specification Revision 2.0 (with ECNs, 2025 bundle)

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