Chargers and power adapters connectors for various hardware  > Seagate pinouts
Part 3066591 NU25-22120-140A

Pin
Number

Pin
Name
Description
 1  +5V  Power supply output, Male, pin 1 (bottom left)
 2  +12V

 Power supply output, Male, pin 2 (bottom right)

 3  +5V

 Power supply output, Male, pin 3 (top left)

 4  +12V  Power supply output, Maile,pin 4 (top right)
SHIELD GND Ground

 GROUND is the SHIELD of this connector.

 

Alternative pinout by Tamer Oral

Pin
Number

Pin
Name
Description 
 1  +12V  Power supply output, Male, pin 1 (bottom left)
 2  +5V

 Power supply output, Male, pin 2 (bottom right)

 3  GND

 Power supply output, Male, pin 3 (top left)

 4 GND  Power supply output, Maile,pin 4 (top right)
SHIELD GND Ground
4 pin mini-DIN male connector layout
4 pin mini-DIN male connector
at the Power supply
4 pin mini-DIN female connector layout
4 pin mini-DIN female connector
at the Drive
According to 7 reports in our database (2 positive and 3 negative) this pinout may be incorrect.

Is this pinout
Seagate Pushbutton External Drive Power supply visual pinout:
Seagate Pushbutton External Drive Power supply diagram
click to enlarge
Source(s) of this and additional information: http://support.seagate.com/kbimg/4985-10.jpg
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