Dell CPU Cooling Fan (4Y9H9)

Keep your Dell Latitude E5450 or E5550 running cool with this 5V PWM cooling fan, engineered for reliable active heat dissipation.

Overview

The Dell 4Y9H9 is a dedicated CPU cooling fan for select Latitude E5000 series laptops. It uses a 4-pin PWM connector for automatic speed control, ensuring efficient cooling under load while minimising noise at idle. The fan operates at 5V DC with a current rating of 0.5A, and features a sleeve bearing for quiet, dependable rotation. Built from plastic and metal, it is designed for internal installation and is supplied as a new unit.

What stands out

• 4-pin PWM connector enables dynamic fan speed adjustment based on CPU temperature
• Low 5V power draw (0.5A) helps preserve laptop battery life
• Sleeve bearing provides smooth, low-friction operation
• Direct replacement for Dell part numbers DC28000FMS0, 04Y9H9, and CN-04Y9H9

Technical details

• Compatible models: Dell Latitude E5450, E5550
• Connector: 4-pin (PWM)
• Voltage: DC 5V
• Current: 0.5A
• Number of wires: 4
• Bearing type: Sleeve
• Heat sink included: No (fan only)
• Material: Plastic, metal
• Installation: Internal

Our verdict

A straightforward replacement fan that restores proper cooling for compatible Dell Latitude laptops, with PWM control for balanced performance and acoustics.