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Small black 40mm square axial fan with three-pin connector

Fans

Fans KD1204PKB1 40x40x20mm 12V 1.1W 7050rpm 3-wire case fan

SKU CH-130M-D0R2G

A 40×40×20 mm 12 V case fan with double ball bearings, 7050 rpm, 9.0 CFM airflow and 31 dBA noise

  • 12 V rated voltage with 4–13 V operating range
  • 7050 rpm maximum speed for strong airflow
  • 0 CFM air volume moves heat efficiently
  • 31 dBA noise level keeps system quiet
  • 100000 hour rated life with double ball bearing

Compact 40 mm axial fan

The SUNON KD1204PKB1 is a 40 x 40 x 20 mm axial fan built for tight enclosures that need forced airflow. It runs on 12 V with a 4 V to 13 V operating range and draws 1.1 W. The three-pin connector provides speed monitoring for motherboard headers.

Thermals and acoustics

Double ball bearings support a rated speed of 7050 rpm, settling to 6200 rpm after acceleration and deceleration phases. Airflow reaches 9.0 CFM while noise stays at 31 dBA. Continuous operation is rated for 100,000 hours.

Mounting and daily use

The slim 20 mm depth fits shallow chassis and heat-exchanger stacks without protruding. Sturdy steel frame construction resists vibration in industrial or embedded systems. Standard three-pin layout ensures plug-and-play compatibility with existing fan headers.

How it compares

Measured against everything we stock in PC Cooling Fans, at today’s prices. Recalculated every night.

Price $36.99
Pricier than about 82% of the 8,339 comparable items (median $19.99).

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Specifications

No published specifications for this item yet.

Questions about this item

How do I install the 40x40x20mm 12V fan and what step is often missed?

Mount the fan using four screws through the 40mm frame, connect the three-pin connector to a motherboard header for speed monitoring, and ensure airflow direction matches the arrow on the housing — the step often missed is verifying the motherboard detects the tachometer signal in BIOS.

What maintenance or replacement will the double ball bearing fan need later?

The double ball bearing is rated for 100,000 hours of continuous operation; after that period the bearing may develop noise or vibration, at which point the entire 40x40x20mm unit should be replaced rather than lubricated.

What limit appears first when the fan runs continuously at 7050 rpm?

Continuous operation at 7050 rpm and 31 dBA will reach the 100,000-hour bearing life rating before thermal or voltage limits become an issue, assuming the supply stays within the 4V-13V working range.

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