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Small black laptop cooling fan with four mounting holes and a four-pin connector

Fans

Fans BI-sonic HP551205H-01 PWM 5V 0.5A HP551205H-02 laptop fan

SKU CH-P2CB-2EPQK

PWM laptop fan runs on 5 V and draws 0.5 A for precise speed control

  • BI-sonic cooling for compatible HP laptops
  • PWM control adjusts speed to thermal demand
  • 5 V 0.5 A power draw fits original spec
  • New condition ready for immediate installation

BI-sonic HP551205H-01 PWM laptop fan

The BI-sonic HP551205H-01 is a PWM-controlled laptop cooling fan that operates at 5 V and draws 0.5 A. It is designed as a direct replacement for compatible notebook thermal modules. The fan uses a 4-pin connector to enable speed regulation by the system firmware. Buyers who need a different voltage, connector layout or form factor should verify compatibility before ordering.

Replacing a worn or noisy original fan

This unit replaces a failed or loud factory fan in supported laptop models. The upgrade is worth it when the existing cooler spins unevenly, overheats the chassis or triggers thermal throttling. It restores the manufacturer's intended airflow profile without modification. Systems that require a higher current draw, a 3-pin header or a proprietary mounting pattern are not supported.

Highlights

  • BI-sonic cooling for compatible HP laptops
  • PWM control adjusts speed to thermal demand
  • 5 V 0.5 A power draw fits original spec
  • New condition ready for immediate installation

Specifications

No published specifications for this item yet.

Questions about this item

Which laptop models use the BI-sonic HP551205H-01 or HP551205H-02 fan?

These part numbers identify the exact replacement for compatible laptops; match the number printed on your original fan to confirm fit.

How is the PWM connector attached during installation?

Align the 4-pin plug with the motherboard header and press straight down; forcing it at an angle bends the pins and stops speed control.

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