The 12V 4056 30000rpm Fan is a versatile cooling solution that strikes a balance between high-speed performance and increased thickness, making it suitable for medium-duty applications where more airflow than a standard compact fan is needed, but extreme speed (like 35000rpm) is unnecessary. The “4056” designation defines its dimensions—40mm in length, 40mm in width, and 56mm in thickness—while the 30000rpm speed rating and 12V DC power supply ensure it delivers robust cooling without sacrificing compatibility or durability. This fan is particularly well-suited for applications like industrial sensors, LED cooling, and mid-range 3D printers, where space allows for a thicker fan and consistent airflow is key.  

The 56mm thickness is a defining feature of the 12V 4056 30000rpm Fan, as it enables a larger impeller and more powerful motor than thinner 40mm fans (like the 4028 model). A thicker fan housing accommodates a deeper impeller— the component that draws in and pushes out air— with longer blades that can move more air per rotation. At 30000rpm, this translates to airflow outputs of 22–30 CFM, significantly higher than the 8–12 CFM of a standard 40mm fan and even exceeding the 15–22 CFM of the thinner 4028 35000rpm fan. This extra airflow is critical for cooling components that generate sustained heat, such as high-power LED modules (used in commercial lighting or automotive headlights) or industrial temperature sensors (which overheat if not cooled, leading to inaccurate readings). The 12V power supply supports this performance efficiently: the motor draws 0.6–1.0A of current, which is manageable for most electronic power systems and avoids the energy waste associated with higher-voltage fans.  

While 30000rpm is slower than the 35000rpm of the 4028 model, it offers a key advantage: reduced noise and vibration. High-speed fans generate more noise due to air turbulence and mechanical friction, but the 12V 4056 30000rpm Fan’s slightly lower speed—combined with its thicker housing and optimized impeller design—lowers operating noise to 40–50 decibels (similar to a quiet office printer). The thicker housing also acts as a vibration dampener, absorbing mechanical hum from the motor and preventing it from transferring to the device the fan is cooling (a critical benefit for sensitive equipment like laboratory sensors or audio amplifiers, where vibration can disrupt performance).  

Durability is another strength of the 12V 4056 30000rpm Fan, thanks to its robust construction and high-quality components. The motor uses dual ball bearings, which are designed to handle the stress of 30000rpm operation far better than sleeve bearings. Dual ball bearings reduce friction by using steel balls to separate the rotating shaft from the stationary housing, extending the fan’s lifespan to 25,000–35,000 operating hours—ideal for applications that require continuous use (e.g., 24/7 industrial equipment). The impeller is made from heat-resistant plastic (often PBT, or polybutylene terephthalate), which can withstand temperatures up to 120°C without warping—critical for use near hot components like LED drivers or 3D printer hotends.  

Installation and compatibility are also user-friendly. The 40x40mm footprint matches standard 40mm fan mounts, making it easy to replace thinner 40mm fans in existing devices (e.g., upgrading a 4028 fan in a 3D printer to get more airflow). The 56mm thickness does require more vertical space, but this is rarely an issue in applications like industrial control panels, LED fixtures, or desktop 3D printers—where there is often room to accommodate a thicker fan. The 12V power requirement aligns with most electronic systems, and many models include 3-pin or 4-pin connectors: 3-pin connectors allow for basic speed monitoring, while 4-pin PWM connectors enable dynamic speed adjustment (e.g., slowing the fan when the device is idle to save energy and reduce noise).  

In medium-duty cooling scenarios—where a standard fan is too weak and an extreme-speed fan is too noisy or unnecessary—the 12V 4056 30000rpm Fan shines. Its combination of increased thickness, balanced speed, 12V compatibility, and durability makes it a reliable choice for industrial, commercial, and hobbyist applications alike.