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Small square 40mm computer case fan with black frame and four-pin connector

SXDOOL

SXDOOL 40mm 12V PWM case fan 40201B1-Q01C-S99

SKU CH-E1BD-QJ2CW

A 40 mm case fan with 12 V PWM control and dual ball bearings

  • TypeCase Fan
  • Bearing Type2 Ball
  • Power Connector4 Pin
  • Quiet cooling with a 1.28W PWM motor
  • Precise speed control via 4-pin PWM connector
  • Long-life reliability from dual ball bearings
  • Compact 40mm frame fits tight chassis spaces

40 mm 12 V PWM case fan

The SXDOOL 40 mm fan delivers 12 V PWM cooling for compact computer cases and small-form-factor builds. Its 2 ball bearing design supports continuous operation in tight spaces where low noise matters. The four-pin connector enables automatic speed control through the motherboard.

Replaces 40x40x20 mm fixed-speed fans

This unit fits the same 40x40x20 mm footprint as many stock coolers while adding PWM regulation and a 1.28 W power draw. The upgrade is worthwhile when the original fan runs at full speed constantly or uses a sleeve bearing that has become noisy. Buyers needing larger airflow volumes or different mounting hole patterns should look elsewhere.

Highlights

  • Quiet cooling with a 1.28W PWM motor
  • Precise speed control via 4-pin PWM connector
  • Long-life reliability from dual ball bearings
  • Compact 40mm frame fits tight chassis spaces

Specifications

TypeCase Fan
Bearing Type2 Ball
Power Connector4 Pin

Questions about this item

Will the 40 mm frame fit a standard 40 × 40 mm mounting pattern?

Yes, the fan measures 40 × 40 × 20 mm and uses the common four-hole square pattern for 40 mm case fans.

How do I connect the 4-pin PWM cable correctly?

Plug the 4-pin connector into a motherboard PWM header; the keyed plug prevents reverse insertion, which is the step most often missed.

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