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40mm 12V PWM Server Cooling Fan 4028 Dual Ball Bearing 4-Pin

$15.30 USD

~~$21.99 USD~~ $15.30 USD

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AVC 4028 High-Speed 40mm PWM Server Cooling Fan – 12V 1A | DBTB0428B2G

Keep your server, workstation, or PC hardware running cool and quiet with this powerful 40mm PWM cooling fan. Designed as a direct replacement for AVC model DBTB0428B2G, this high-speed 4028 fan delivers exceptional airflow in a compact 40×40mm form factor — perfect for tight server chassis, networking equipment, and high-performance computing builds.

Made in Mainland China.

Key Features

High-Speed Performance: Rated at 12V / 1A for powerful, reliable airflow in demanding server environments
PWM Speed Control: 4-wire 4-pin connector allows intelligent PWM speed management for optimal thermal performance and noise balance
Dual Ball Bearing: Long-lasting dual ball bearing design ensures extended service life and stable operation even under continuous high-load conditions
Compact 40×40mm (4028) Form Factor: Fits standard 40mm server and networking equipment fan mounts
Durable Plastic Construction: Lightweight yet sturdy black plastic housing built for longevity
100% Brand New: Fresh stock, not refurbished or pulled from used equipment

Specifications

Fan Size	40 × 40 × 28mm (4028)
Voltage	12V DC
Current	1A
Connector	4-Pin PWM (4-wire)
Bearing Type	Dual Ball Bearing
Color	Black
Material	Plastic
Package Includes	1 × Cooling Fan

Compatible Use Cases

This fan is ideal for use in servers, rack-mount equipment, network switches, routers, mini PCs, and any system requiring a standard 40mm replacement cooling fan with 4-pin PWM control.

Safety & Standards Reference

For guidance on electronics safety and energy efficiency in computing equipment, visit the U.S. Department of Energy – Electronics Energy Saving resource.

Note: Please allow ±5–10mm variance due to manual measurement. Colors may vary slightly due to monitor calibration and lighting conditions.

Frequently Asked Questions

Q: Is this 40mm PWM fan compatible with AVC DBTB0428B2G server fan slots?

A: Yes, this fan is designed as a direct replacement for the AVC 4028 DBTB0428B2G. It shares the same 40×40×28mm dimensions and 4-pin PWM connector, making it a plug-and-play replacement for compatible server and networking equipment.

Q: What does the 4-pin PWM connector do compared to a standard 3-pin fan?

A: The 4-pin PWM (Pulse Width Modulation) connector allows the motherboard or server controller to automatically adjust fan speed based on system temperature. This results in quieter operation at lower loads and maximum cooling performance when needed — unlike 3-pin fans that run at a fixed speed.

Q: Why choose a dual ball bearing fan over a sleeve bearing fan?

A: Dual ball bearing fans offer significantly longer operational lifespans, better performance at higher temperatures, and consistent airflow even when mounted horizontally or vertically. They are the preferred choice for 24/7 server and datacenter environments where reliability is critical.