Seorin C&I has officially launched two models in Thermalright's compact system cooling fan series, the TL-B4020, in South Korea. Both products feature dimensions of 40 x 40 x 20mm and a maximum rotational speed of 5,500 RPM.
The new lineup consists of the black TL-B4020 and the white TL-B4020W. Designed to secure necessary airflow even in limited installation spaces, they support PWM functionality to control rotational speed according to system loads. Speeds can be increased when active cooling is required and dialed back under light loads, catering to setups that require targeted cooling for specific components or tight spaces.
The fans utilize dual ball bearings that support the axis at two points, top and bottom. This structure ensures stability and durability by reducing wobbling and friction generated during high-speed rotation. Vibrations are suppressed using reinforced struts and silicone mounts, with a maximum noise level of 24.3 dBA.
The frame's struts are designed with a trapezoidal cross-section to reduce air resistance and turbulence while reinforcing the frame structure. A built-in design routes cables inside the struts, minimizing obstructions in the airflow path. With their 40mm size and 20mm thickness, the fans can be utilized in space-constrained environments such as mini PCs, small electronic devices, and RAM cooling.
The TL-B4020 and TL-B4020W are officially distributed in South Korea through Seorin C&I. Before purchasing or installing, users should verify their system's available mounting space, support for the 40 x 40 x 20mm dimensions, and fan connection methods.
