4020 DC Brushless Cooling Fan 40x40x20mm Axial Fan 5V 12V 24V High Airflow Low Noise

H1:Overview

The 4020 cooling fan is a compact 40mm × 40mm ×20mm brushless DC axial fan, widely used for devices requiring higher airflow and static pressure than 4010 / 4015 slim models. Adopt high-performance miniature brushless motor structure, with anti-blocking, reverse polarity protection built-in. We offer multiple speed versions from 2200RPM to 4800RPM to balance airflow and noise. Optional PWM speed regulation and FG speed feedback signal to meet intelligent thermal control requirements.

H2:Key Features

1. 20mm thickness, higher airflow & static pressure compared to 4010 and 4015 fan

2. Multiple voltage options: DC 5V /12V /24V, wide voltage tolerance

3. Bearing selection: Sleeve bearing, One ball bearing, Double ball bearing

• Sleeve: Cost-effective for short duty cycle

• Double ball: Long service life for 24/7 continuous running

4. Optimized aerodynamic blade design, low noise & stable air delivery

5. Built-in protection: Locked rotor protection, reverse connection protection

6. Optional function: FG signal, PWM speed control, IP waterproof version

7. Certifications: CE, RoHS. OEM & ODM support (cable length, connector, logo)

H3:Application Scenarios

Perfect cooling for compact devices:

✅ Beauty equipment, portable skincare instruments 

✅ Mini medical instruments, handheld diagnostic devices 

✅ Small power module, mini charger, USB powered devices 

✅ Portable detector, small IoT gateway 

✅ Mini projector, small camera heat dissipation 

✅ Tiny industrial sensors, portable test instruments

H4:Our Advantage

As a professional DC cooling fan manufacturer in Shenzhen, we supply standard 4020 fans and accept custom modification.

• Fast sample support

• Stable mass production capacity

• Strict quality inspection before shipment

• Flexible MOQ for bulk orders

• Custom cable, connector, fan label, waterproof treatment available

H5:Complete certifications including CE, ROHS, UKCA, UL, FCC, and more.

H6:Packaging & After-Sales Service

 H7:FAQ

Q1: Can I get a sample of 4020 cooling fan? A: Yes, samples are available for quality testing.

Q2: What bearing type should I choose? A: Double ball bearing for long time continuous operation; sleeve bearing for cost-sensitive intermittent use.

Q3: Do you support custom wires and connectors? A: OEM service is supported, we can customize wire length and terminal connectors.