Dell CPU-kylare (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.