Dell TFX Desktop Power Supply Replacement Guide – 250W H250AD-00 for OptiPlex DT & Vostro
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Product link: https://nadalan-power.com/products/250w-dell-h250ad-00
Is Your Dell DT or TFX Chassis Desktop Having Power Issues? Here‘s Your 250W Replacement Guide
If you own a Dell OptiPlex DT (Desktop) or Vostro desktop with a TFX form factor power supply and are experiencing power failures, random shutdowns, or simply need a spare or upgrade PSU, you’ve come to the right place.
Dell uses specific power supply designs for their DT (Desktop/Medium) chassis. Finding the correct replacement can be challenging because these units use the TFX form factor – different from standard ATX power supplies.
The good news: This 250W unit is a high-performance replacement with up to 99% conversion efficiency – far superior to standard universal models!
This guide will help you quickly identify if the 250W H250AD-00 Power Supply is the right match for your Dell computer.
Quick Compatibility Check
This 250W power supply is specifically designed for the following Dell models:
Dell OptiPlex DT Series (Desktop / Medium Chassis):
| Series | Compatible Models |
| OptiPlex 300 Series | 390 DT, 3010 DT |
| OptiPlex 700 Series | 790 DT, 7010 DT |
| OptiPlex 900 Series | 990 DT, 9010 DT |
Dell Vostro Series:
| Series | Compatible Models |
| Vostro 3000 Series | V3800, V3900 |
| Vostro 200 Series | 220S, 230S |
| Vostro 500 Series | 580S |
| Vostro 600 Series | 620S |
✅ TFX Structure: This power supply uses the TFX form factor, suitable for DT chassis and various small chassis configurations.
Compatible Power Supply Models
This power supply replaces the following Dell power supply models:
| Model Number | Compatible? |
| H250AD-00 | ✅ Yes (main model) |
| F250AD-00 | ✅ Yes |
| L250AD-00 | ✅ Yes |
| D250AD-00 | ✅ Yes |
| AC250AD-00 | ✅ Yes |
| DPS-250AB-68A | ✅ Yes |
| L250PS-00 | ✅ Yes |
| L250PS-01 | ✅ Yes |
| F250ED-00 | ✅ Yes |
| HU250AD-00 | ✅ Yes |
| L250ED-00 | ✅ Yes |
| H250AD-01 | ✅ Yes |
| TFX0250AWWA | ✅ Yes |
| DPS-250AB-35A | ✅ Yes |
Compatible Part Numbers:
| Part Number | Compatible? |
| 0HY6D2 | ✅ Yes |
| 0K2H58 | ✅ Yes |
| 0DY72N | ✅ Yes |
| 07GC81 | ✅ Yes |
| 0CYY97 | ✅ Yes |
| 04M8GF | ✅ Yes |
Key Specifications at a Glance
| Specification | Detail |
| Power Output | 250W |
| Model Numbers | H250AD-00 (and 13+ compatible models) |
| Dimensions (L×W×H) | 175 × 85 × 65 mm |
| Form Factor | TFX (Desktop / Small Chassis) |
| Input Voltage | 100V-240V (Active PFC, wide range) |
| Conversion Efficiency | Up to 99% |
| Connector Cable Length | CPU 4-pin: 60cm (ultra-long) |
Connector Configuration
| Interface Type | Connector | Quantity | Cable Length |
| Motherboard Main Power | 24-pin | 1 | Standard |
| CPU Power | 4-pin | 1 | 60cm (ultra-long) |
| SATA Power | SATA | 3 | Standard |
Special Features – What Makes This PSU Superior
This is not comparable to those universal models! Here‘s why:
| Feature | Benefit |
| Up to 99% Conversion Efficiency | Extremely efficient – less heat, lower energy bills, longer life |
| Active PFC (Power Factor Correction) | Wide voltage range supporting 110-230V – works worldwide |
| Ultra-Long 4-pin CPU Cable | 60cm – reaches any motherboard placement |
| All Copper Wire | Superior conductivity, less resistance, more reliable |
| 3x SATA Ports | Supports multiple drives |
| Non-Modified, Non-Extended | Original cables – no modification, no extension cords needed |
| Work Indicator Light | Easy status monitoring |
| Reset Start Button | Convenient power control |
✅ Work Indicator Light & Reset Button: Equipped with a work indicator light and reset startup button for easy monitoring and control.
TFX Form Factor – What You Need to Know
| Aspect | Detail |
| Form Factor | TFX (Thin Form Factor) |
| Typical Use | Small chassis, DT desktops, slim cases |
| Advantages | Compact size, fits in tight spaces |
| Different From | Standard ATX (larger), SFX (different mounting) |
This power supply is suitable for DT chassis and TFX structure – designed for various small chassis configurations.
Physical Size – Measure Before You Order
| Dimension | Measurement |
| Length | 175 mm |
| Width | 85 mm |
| Height | 65 mm |
This TFX form factor is designed to fit perfectly inside Dell OptiPlex DT and Vostro small chassis.
Why Choose This 250W Replacement Power Supply?
| Feature | Benefit |
| Dell TFX Specific | Designed for OptiPlex DT and Vostro TFX chassis |
| Up to 99% Efficiency | Superior performance – not comparable to universal models |
| Active PFC | Wide 110-230V range – works worldwide |
| Ultra-Long CPU Cable | 60cm – reaches any motherboard |
| All Copper Wire | Superior quality and reliability |
| 3x SATA | Supports multiple storage drives |
| Work Indicator Light | Easy monitoring |
| Reset Button | Convenient control |
| Direct Replacement | No modification needed – original cables |
| 1-Year Warranty | Protected by Nadalan‘s 1-year return/exchange policy |
| Fast Global Shipping | Air freight to most countries in approximately 10 days |
Superior Quality Note:
All copper wire, 4-pin CPU interface is super long, and comes with 3 SATA serial ports, not comparable to those universal models! The conversion efficiency can reach up to 99%.
This power supply is built with premium materials and superior engineering – far exceeding the quality of generic universal power supplies.
Installation Tips
- Power down and unplug your Dell desktop completely.
- Open the case – DT and TFX chassis typically have thumbscrews on the back.
- Disconnect cables from the old power supply – note the 24-pin motherboard, 4-pin CPU (60cm), and 3x SATA connectors.
- Take a photo of the connector layout before disconnecting.
- Remove the old PSU – TFX units are usually held by 3-4 screws.
- Install the new PSU – secure with screws, then reconnect all cables.
- The ultra-long 60cm CPU cable provides flexibility for cable routing – use it for clean management.
- Test before closing – power on to ensure the system boots properly.
Frequently Asked Questions
Q1: What Dell models is this 250W power supply compatible with?
OptiPlex DT: 390, 790, 990, 3010, 7010, 9010 (Desktop/Medium chassis)
Vostro: V3800, V3900, 580S, 220S, 230S, 620S
Q2: What are the compatible power supply model numbers?
H250AD-00, F250AD-00, L250AD-00, D250AD-00, AC250AD-00, DPS-250AB-68A, L250PS-00, L250PS-01, F250ED-00, HU250AD-00, L250ED-00, H250AD-01, TFX0250AWWA, DPS-250AB-35A.
Q3: What are the compatible part numbers?
0HY6D2, 0K2H58, 0DY72N, 07GC81, 0CYY97, 04M8GF.
Q4: What connectors does this power supply have?
1x 24-pin motherboard, 1x 4-pin CPU (60cm ultra-long), and 3x SATA.
Q5: What form factor is this power supply?
TFX (Thin Form Factor) – suitable for DT chassis and various small chassis configurations.
Q6: What is the conversion efficiency?
Up to 99% – far superior to standard universal models.
Q7: What does “active PFC” mean?
Active Power Factor Correction – provides wide voltage range support (110-230V) and more efficient power delivery.
Q8: What is the CPU cable length?
60cm – ultra-long for flexible routing in any chassis.
Q9: What are the physical dimensions?
175mm × 85mm × 65mm (TFX form factor).
Q10: Does this work with Dell OptiPlex 390 DT?
Yes – OptiPlex 390 DT is specifically listed as compatible.
Q11: Does this work with Dell OptiPlex 7010 DT?
Yes – OptiPlex 7010 DT is listed as compatible.
Q12: Is this a genuine Dell power supply?
This is a high-quality compatible replacement with up to 99% conversion efficiency – engineered to exceed standard universal models.
Q13: What is the warranty period?
Nadalan offers a 1-year warranty on this power supply.
Q14: How long does shipping take?
Approximately 10 days by air freight. Tax and duty included for most countries.
Q15: Do you offer wholesale pricing?
Yes. Nadalan welcomes bulk orders and corporate partnerships. Contact us to discuss custom negotiations and volume pricing.
Still Not Sure? Contact Us
Dell TFX power supplies have specific compatibility requirements. If you‘ve checked the model numbers but still aren’t 100% sure, don‘t guess. Send us a photo of your original power supply’s label, and we will confirm compatibility for you.
Contact Nadalan:
- Email: gc_ds@sina.com
- Phone / WhatsApp: +0086 18062682902
Order today and get your Dell OptiPlex DT or Vostro desktop back up and running with premium, high-efficiency power!