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Small black 40mm square case fan with 3-pin connector

SXDOOL

SXDOOL KDE1204PFV1 40mm 12V 1.7W 3-pin case fan

SKU CH-J26M-9Y78Z MPN KDE1204PFV1

A 40 mm 12 V case fan with a 3-pin connector draws 1.7 W to cool compact builds

  • TypeCase Fan
  • Fan Size40mm
  • Power Connector3 Pin
  • Compact 40 mm frame fits tight chassis spaces
  • 12 V DC input matches standard motherboard headers
  • Low 1.7 W draw keeps power budget minimal
  • Three-pin connector enables speed monitoring
  • Direct Sunon KDE1204PFV1 replacement restores cooling fast

Compact 40 mm replacement fan

The SXDOOL KDE1204PFV1 is a 40 mm case fan built as a direct repair part for Sunon 3-wire coolers. It runs on 12 V and draws 1.7 W, making it suitable for tight spaces where a small footprint is required.

Simple three-pin swap

Installation consists of unplugging the old fan and connecting the 3-pin header to the same motherboard or controller socket. The 40×40×20 mm frame matches the original mounting holes, so no new screws or adapters are needed. The only common issue is reversing the connector orientation, which leaves the fan dead or reporting zero speed.

Verify voltage and connector first

Confirm the existing cooler uses a 12 V supply and a standard 3-pin layout before ordering. Check that the 40 mm square footprint and 20 mm thickness fit the heatsink shroud or chassis cutout. Builders who need PWM speed control or a larger airflow volume should look elsewhere.

Highlights

  • Compact 40 mm frame fits tight chassis spaces
  • 12 V DC input matches standard motherboard headers
  • Low 1.7 W draw keeps power budget minimal
  • Three-pin connector enables speed monitoring
  • Direct Sunon KDE1204PFV1 replacement restores cooling fast

Specifications

TypeCase Fan
Fan Size40mm
Power Connector3 Pin

Questions about this item

How do I confirm the 40mm KDE1204PFV1 is spinning correctly after connecting the 3-pin header?

Power the system and watch the blades rotate; the fan should start immediately at 12V and move air steadily through the 20mm thick frame.

What comes in the package and is anything else required for installation?

The box contains one KDE1204PFV1 cooling fan only; you will need a spare 3-pin motherboard or controller header and four 40mm mounting screws.

Which model should I choose if I need a direct Sunon 3-wire replacement?

Select the KDE1204PFV1 4010 — it matches the 12V 1.7W spec and 3-pin connector of the original Sunon cooler.

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