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The Dell D220P-01 is a 220-watt (peak) ATX-style power supply manufactured primarily by Lite-On and HiPro for Dell OptiPlex desktops (GX270, GX280, SX280, etc.). While it physically resembles a standard ATX PSU, Dell notoriously deviated from the standard ATX specification in the early-to-mid 2000s.
Key Specifications:
Note on "Pinout 2": Many online threads reference a second revision of this PSU where pin 18 (normally -5V in standard ATX) is repurposed for a "PS_ON" sense line or a soft-power control signal. The "2" also sometimes refers to the secondary 4-pin connector pinout (often mistaken for P4 but actually proprietary).
If you have ever cracked open a Dell Optiplex GX270, GX280, or an SX280, you have encountered the Dell D220P-01. Manufactured by Delta Electronics (Model number DPS-220PB A), this 220-watt power supply unit (PSU) is a classic example of proprietary OEM engineering. Unlike standard ATX power supplies, the D220P-01 uses a non-standard 20-pin main connector and a unique "sense" wire configuration.
For years, techs have salvaged these units for their surprising build quality (Delta is known for robust components) or attempted to adapt them for standard motherboards. This article provides the definitive pinout for Revision 2 of this PSU. Miswiring this unit will cause immediate short circuits, motherboard damage, or trigger the PSU’s "latching" protection mode.
Most guides mention "Pinout 2" referring to the secondary 4-pin connector near the 20-pin. On standard ATX, this is a P4 12V CPU connector. On the D220P-01:
| Pin | Dell D220P-01 | Standard P4 | |-----|---------------|--------------| | 1 | GND | GND | | 2 | GND | GND | | 3 | +12V1 | +12V | | 4 | +12V2 | +12V | Dell D220p 01 Power Supply Pinout 2
However, the D220P-01 sometimes routes +3.3V or +5V instead of +12V on certain revisions (especially in small form factor models). Always verify with a multimeter.
"Pinout 2" warning: If your D220P-01 has a 2×2 square 4-pin connector with yellow/black wires only, it is standard +12V. If it has red/orange wires, it is NOT a CPU connector – it may be for powering an IDE drive or proprietary Dell riser card.
Unlike standard ATX power supplies that route every necessary signal through a single 20- or 24-pin motherboard connector, Dell used a split design in many Optiplex models:
Why "Pinout 2"? Many users searching for "pinout 2" are specifically looking for the second connector’s pin assignment. The main 20-pin is well-documented, but the smaller connector varies between Dell models. For the D220P-01, the secondary connector is a 6-pin Molex 22-01-2065 (or compatible) with a specific keying that prevents plugging into standard 4-pin floppy or fan headers.
The Dell D220p 01 power supply may also feature other connectors such as:
Important Note: The pinout provided is for general reference and might not cover every specific detail or variation of the Dell D220p 01 power supply. Always ensure you consult the specific documentation for your model or a trusted source when working with power supplies to avoid any damage or safety risks. The Dell D220P-01 is a 220-watt (peak) ATX-style
Safety Precaution: Working with power supplies can be dangerous due to the risk of electric shock. Ensure you take necessary precautions such as grounding yourself and ensuring the power supply is not connected to a power source when making any connections.
This content is a general guide and might need adjustments based on the specific requirements or details of the Dell D220p 01 power supply. Always verify information through official documentation or support forums for the most accurate and up-to-date details.
I assume you mean the Dell D220p‑01 laptop power adapter (barrel plug) — here’s the pinout for its 7.4×5.0 mm DC barrel with center pin (typical for Dell laptops):
If you meant a different D220p‑01 part (e.g., an internal PSU board or multi‑pin connector), tell me which connector (photo or part label) and I’ll give the detailed pinout.
Related searches (suggested): Dell D220p-01 power adapter pinout, Dell laptop barrel pinout 7.4x5.0mm, Dell charger center pin voltage
This guide is intended for electronics hobbyists, repair technicians, and PC builders who wish to repurpose this specific power supply or troubleshoot it outside of a Dell OptiPlex chassis. Note on "Pinout 2": Many online threads reference
The Dell D220P-01 power supply typically comes with several types of connectors to support different components of a computer system. The main connectors include:
| Pin | Wire Color | Signal | |-----|------------|--------| | 1 | Yellow | +12V | | 2 | Brown | +12V | | 3 | Black | GND | | 4 | Black | GND | | 5 | Orange | +3.3V | | 6 | Red | +5V |
This connector is not a standard PCIe or ATX12V 4‑pin. It often powers the CPU VRM in Dell’s proprietary boards.
The ATX connector is usually a 20-pin or 24-pin connector that supplies power to the motherboard.
| Pin # | Description | Pin # | Description | |-------|--------------|----------------|-----------------| | 1 | 3.3V | 11 | 3.3V | | 2 | 3.3V | 12 | -12V | | 3 | GND | 13 | GND | | 4 | 5V | 14 | PS-ON | | 5 | GND | 15 | GND | | 6 | 5V | 16 | 5V Standby | | 7 | GND | 17 | 5V | | 8 | 12V | 18 | 12V | | 9 | 12V | 19 | 5V | | 10 | 5V | 20 | 3.3V or PWR_OK |
For a 20-pin ATX connector, pins 21-24 are usually reserved or used for different functions.
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