Dell OptiPlex SFF Power Supply Replacement Guide – 240W AC240AS-00 Compatibility
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Product link: https://nadalan-power.com/products/240w-dell-optiplex-sff-power-supply
Is Your Dell OptiPlex SFF Desktop Having Power Issues? Here‘s Your 240W Replacement Guide
If you own a Dell OptiPlex Small Form Factor (SFF) desktop (3010, 7010, 9010, or 390/790/990 series) and are experiencing power failures, random shutdowns, or simply need a spare power supply, you’ve come to the right place.
Dell OptiPlex SFF desktops use a specific form factor power supply that is different from standard ATX units. Finding the correct replacement can be confusing because the size, connector layout, and mounting points are unique to Dell‘s SFF chassis.
This guide will help you quickly identify if the 240W AC240AS-00 Power Supply is the right match for your Dell OptiPlex.
Quick Compatibility Check
This 240W power supply is specifically designed for the following Dell OptiPlex SFF (Small Form Factor) models:
| Series | Compatible Models |
| Dell OptiPlex 30 Series | 3010 SFF |
| Dell OptiPlex 70 Series | 7010 SFF |
| Dell OptiPlex 90 Series | 9010 SFF |
| Dell OptiPlex 90 Series | 390 SFF, 790 SFF, 990 SFF |
⚠️ Important: This power supply is ONLY compatible with Dell OptiPlex SFF (Small Form Factor) desktops. It will NOT work with Dell tower desktops, Micro (USFF) models, or OptiPlex models from other generations without checking compatibility first.
Compatible Model Numbers
This power supply replaces the following model numbers:
| Model Number | Compatible? |
| AC240AS-00 | ✅ Yes (main model) |
| L240AS-00 | ✅ Yes |
| AC240ES-00 | ✅ Yes |
| H240AS-00 | ✅ Yes |
| H240ES-00 | ✅ Yes |
| D240ES-00 | ✅ Yes |
| DPS-240WB | ✅ Yes |
Compatible Part Numbers:
| Part Number | Compatible? |
| RV1C4, 0RV1C4 | ✅ Yes |
| J50TW, 0J50TW | ✅ Yes |
| 2TXYM, 02TXYM | ✅ Yes |
| 3WN11, 03WN11 | ✅ Yes |
| 709MT, 0709MT | ✅ Yes |
| 592JG, 0592JG | ✅ Yes |
| 66VFV, 066VFV | ✅ Yes |
| D240A002L | ✅ Yes |
💡 Tip: Simply remove your old power supply and check the sticker on top. If you see any of the model numbers or part numbers listed above, this replacement will work perfectly.
Key Specifications at a Glance
| Specification | Detail |
| Max Power Output | 240W |
| Model Number | AC240AS-00 |
| Dell Part Number | 3WN11 / 03WN11 / CN-03WN11 |
| Dimensions (L×W×H) | 24 cm × 7.1 cm × 6.1 cm (240 × 71 × 61 mm) |
| Form Factor | Dell OptiPlex SFF (Small Form Factor) |
| Input Voltage | 100-240V (Universal) |
This 240W output is ideal for Dell‘s SFF business desktops, providing stable power for office tasks, web browsing, and daily productivity work.
Connector Configuration – Check Your Needs
This power supply uses a standard 24-pin ATX motherboard connector – unlike some proprietary Dell units. However, the physical size and mounting are specific to Dell SFF chassis.
| Interface Type | Connector | Quantity |
| Motherboard Main Power | 24-pin ATX | 1 |
| CPU Power | 4-pin ATX +12V | 1 |
| SATA Power | Serial ATA (SATA) | 2 |
| Internal Device | MINI SATA | 1 |
✅ Note: The 24-pin ATX connector is standard, but the cable lengths and physical dimensions are customized for Dell OptiPlex SFF cases. This is a direct replacement unit, not a universal adapter.
Physical Size – Measure Before You Order
Even if the model number matches, it‘s always a good idea to check the size.
| Dimension | Measurement |
| Length | 24 cm (240 mm) |
| Width | 7.1 cm (71 mm) |
| Height | 6.1 cm (61 mm) |
This specific size is designed to fit perfectly inside Dell OptiPlex SFF (3010, 7010, 9010, 390, 790, 990) chassis. The screw holes and mounting bracket alignment match Dell‘s SFF specification.
Why Choose This 240W Replacement Power Supply?
| Feature | Benefit |
| Dell OptiPlex SFF Specific | Designed specifically for 3010/7010/9010/390/790/990 SFF |
| Direct Replacement | No adapter or modification needed – works right out of the box |
| Universal Input | 100-240V – works worldwide (plug adapter may be needed) |
| Multiple SATA Connectors | 2 SATA + 1 Mini SATA – supports multiple drives |
| Standard 24-pin ATX | Compatible with Dell‘s SFF motherboard connector |
| 1-Year Warranty | Protected by Nadalan‘s 1-year return/exchange policy |
| Fast Global Shipping | Air freight to most countries in approximately 10 days |
Installation Tips
- Power down and unplug your Dell OptiPlex completely.
- Open the case – Dell OptiPlex SFF cases typically have a latch or thumbscrew on the back.
- Disconnect cables from the old power supply – note where each connector goes (24-pin main, 4-pin CPU, SATA drives).
- Remove the old PSU – usually held by 3-4 screws on the back of the case.
- Install the new PSU – secure with screws, then reconnect all cables.
- Test before closing – power on to ensure the system boots properly.
Frequently Asked Questions
Q1: What Dell OptiPlex models is this 240W power supply compatible with?
This power supply is compatible with Dell OptiPlex 3010 SFF, 7010 SFF, 9010 SFF, 390 SFF, 790 SFF, and 990 SFF.
Q2: What are the compatible part numbers?
Compatible part numbers include: RV1C4, 0RV1C4, J50TW, 0J50TW, 2TXYM, 02TXYM, 3WN11, 03WN11, 709MT, 0709MT, 592JG, 0592JG, 66VFV, 066VFV, and D240A002L.
Q3: What connectors does this power supply have?
It includes: 1x 24-pin ATX motherboard connector, 2x SATA connectors, 1x 4-pin CPU power connector, and 1x Mini SATA (internal) connector.
Q4: What are the physical dimensions?
24 cm (L) × 7.1 cm (W) × 6.1 cm (H) – specifically designed for Dell OptiPlex SFF cases.
Q5: Is this a standard ATX power supply?
The motherboard connector is standard 24-pin ATX, but the physical size, shape, and mounting are specific to Dell OptiPlex SFF desktops. It is NOT a standard ATX power supply for generic PC cases.
Q6: Can I use this power supply on a Dell tower desktop?
No. This is specifically designed for Dell OptiPlex SFF (Small Form Factor) desktops. Tower models use a different size and mounting configuration.
Q7: What is the warranty period?
Nadalan offers a 1-year warranty on this power supply. If any issue occurs within one year, contact us for a replacement or refund.
Q8: How long does shipping take? Do I need to pay tax?
Standard air freight delivers to most countries in approximately 10 days. Tax and duty are included for most destinations.
Q9: What payment methods do you accept?
We accept PayPal, credit cards (Visa, Mastercard, American Express), and other major payment methods.
Q10: 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
If you‘ve checked the model numbers, sizes, and connectors 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 SFF desktop back up and running with reliable power.