Dell 250W Power Supply Unit (PSU) - 3WFNF Inspiron 540S/545S

High-Quality Replacement Power Supply for Dell Slim Desktop Systems

$20.00

Dell 250W Power Supply Unit Front View - Model 3WFNF

Front view of Dell 250W PSU - Click to enlarge

Dell Power Supply Connectors and Cable Details

Connector details and specifications - Click to enlarge

Dell 250W Power Supply Side View with Model Numbers

Side view showing model identification - Click to enlarge

Product Overview

This genuine Dell 250W power supply unit (PSU) is designed specifically for Dell slim desktop computers. With model number **3WFNF**, this reliable power supply provides stable power delivery for your Dell system's critical components.

Perfect for replacing failed or failing power supplies in Dell Optiplex, Inspiron, Vostro, and Studio slim desktop models. This unit ensures compatibility and reliable performance for your business or home computing needs.

Technical Specifications

**Max Output:** 250 Watts
**Input Voltage:** 100-240V AC
**Input Current:** 4.4A (50-60Hz)
**Form Factor:** TFX (Thin Form Factor)
**Efficiency:** 80% Minimum
**Cooling:** 80mm Fan with Thermal Control

Connector Details

**P1:** 24-Pin ATX Main Power
**P2:** 4-Pin ATX 12V Power
**P3, P8, P9:** SATA Power Connectors
**Total Connectors:** 5 Power Outputs
**Cable Length:** Standard Dell Configuration
**Connector Type:** Industry Standard Pins

Compatibility

**Dell Optiplex:** 390, 790, 990, 3010 (Slim/DT Models)
**Dell Inspiron:** 537s, 540s, 545s, 546s
**Dell Vostro:** 200s, 220s, 230s, 260s, 400s
**Dell Studio:** 540s, 537s, 560s
**Form Factor:** Slim Desktop (DT) Systems
**Also Fits:** Various Small Form Factor Models

Compatible Part Numbers

This power supply is compatible with the following Dell part numbers and equivalents:

0HY6D2, CYY97, 7GC81, HY6D2, WX9P8, 6MVJH, YJ1JT, 3MV8H, 3WFNF, 5FFR5, 76VCK, MPX3V, PWJ55, T498G, W208D, W209D, W210D, X3KJ8, XFWXR, D250AD-00, L250NS-00, PS-5251-08D, PS-5251-5, H250AD-00, D250A1005L, D250ED-00, DPS-250AB-67 A, F250ED-00, D-0250ADU00-101, D250ND-00, REF, DPS-250AB-73A, AC250NS-00, PCA038, TFX0250D5WB, D250AD-01, D250ED-01, DPS-250AB-68 A, F250AD-00, D-0250ADU00-201, PC7068, HP-D2506R0, PS-5251-5, DPS-250AB-36, TFX0250D5WB, H250ED-00, D250E006L, PS-5251-06

Ready to Order?

This Dell 250W Power Supply is in stock and ready to ship. Add to cart for fast delivery or local pick-up.

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📍 Local Pickup Available

**This item is available for pickup at our Somerset, New Jersey location.** Skip the shipping fees and get your power supply today.

**Address:**
1075 Easton Ave. Tower 2 Suite 5
Somerset, NJ 08873

**Pickup Hours:**
Monday-Friday: 10:00 AM - 8:30 PM
Saturday: 10:00 AM - 2:00 PM
Sunday: Closed

Why Choose This Dell Power Supply?

Genuine Dell Replacement Part

This isn't a generic compatible power supply - it's a **genuine Dell part** designed specifically for Dell systems. This ensures perfect fitment, proper connector alignment, and reliable performance that matches your original equipment.

Ideal for Business and Home Use

Whether you're maintaining office computers in a business environment or upgrading a home desktop, this 250W PSU provides the stable power delivery needed for consistent performance. The **TFX form factor** fits perfectly in slim desktop cases where space is limited.

Easy Installation

Replacing a power supply is one of the simpler computer upgrades. With just a screwdriver and basic knowledge, most users can install this unit in under 30 minutes. **Remember to always disconnect power before working inside your computer.**

Troubleshooting Power Issues

If your Dell computer won't turn on, experiences random shutdowns, or makes unusual noises from the power supply area, this replacement unit can solve those problems. A failing power supply can cause multiple system issues that are resolved with a replacement.