Cooling Fan & Heatsink for W520 — KSB06105HA / 04W1576 / 75Y5778 (4Wire DC5V)

Replacement cooling fan and heatsink assembly compatible with the Lenovo ThinkPad W520. Fits part numbers KSB06105HA, 04W1576 and 75Y5778. Features a 4Wire connector and operates at DC5V. Designed as a direct swap for W520 systems requiring a replacement cooling module — verify compatibility with your exact model before ordering.