Berg Floppy Pinout
Small 4-pin power connector for 3.5-inch floppy drives, supplying +5 V and +12 V.
Overview
The Berg floppy power connector is a 4-pin 2.5 mm-pitch connector that powered 3.5-inch floppy drives and some fans. It carries +5 V, +12 V, and two grounds.
Note the pin order is the reverse of the larger Molex peripheral connector: Berg pin 1 is +5 V and pin 4 is +12 V, whereas Molex pin 1 is +12 V and pin 4 is +5 V.
Pinout
| Pin | Name | Function | Description |
|---|---|---|---|
| 1 | +5V | POWER / VIDEO | +5 V supply (red wire) |
| 2 | COM | GND | Ground (black wire) |
| 3 | COM | GND | Ground (black wire) |
| 4 | +12V | POWER | +12 V supply (yellow wire) |
Notes
- Pin order is mirrored relative to the Molex 4-pin: Berg pin 1 = +5 V / pin 4 = +12 V.
- Small contacts - for low-current loads like floppy drives and case fans.
Reference: ATX PC power supply connector reference (Berg floppy)· verified 2026-06-27