For COOLSERVER BB7515BU B127515BU 75×15mm Centrifugal Blower Fan, DC 12V 0.80A 4-Wire PWM Dual Ball Bearing Server Cooling Fan for 1U Server CPU Copper Heatsink Replacement

This COOLSERVER centrifugal blower fan is a direct OEM replacement part coded BB7515BU and B127515BU, with overall dimension 75mm × 75mm × 15mm, specially designed for 1U rack servers and compact copper CPU heat sinks. It runs on DC 12V input with rated current 0.80A to provide strong airflow and high static pressure, efficiently dissipating concentrated heat from high-load CPUs and server chipsets.

Adopting dual ball bearing structure, the blower features outstanding durability and low wear resistance, supporting long-term non-stop running for industrial server environments without frequent maintenance. The 4-wire PWM design realizes automatic speed regulation: the motherboard adjusts fan RPM in real time according to internal temperature, balancing cooling performance and operating noise. The fourth wire transmits real-time fan speed signal for system hardware monitoring.

Different from ordinary axial cooling fans, the turbine centrifugal design pushes concentrated airflow through dense stacked copper fins, solving poor heat dissipation issues of slim 1U server radiators. It comes with a standard 4Pin multi-color wiring harness and matching plastic terminal plug, no wiring modification required during replacement.

The reinforced plastic fan housing reduces vibration during high-speed rotation to lower resonance noise. Built-in over-current protection circuit prevents fan burnout caused by abnormal voltage fluctuation. Widely compatible with LGA775 1U CPU coolers, compact rack servers, industrial embedded equipment and thermal modules that use BB7515BU blowers. It is an ideal spare cooling part for IT maintenance shops and server DIY upgrades.