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Small black 38mm square PWM fan with four wires

Ruth's sister

Ruth's sister 38x38x28mm 4-wire PWM 12V 1.02A internal power cable

SKU CH-R90X-01XNZ

A 38×38×28 mm four-wire PWM fan drawing 1.02 A at 12 V for internal cooling

  • 12V PWM control for precise fan speed regulation
  • 38×38×28 mm form factor fits compact chassis builds
  • 02 A current rating delivers strong airflow performance
  • Four-wire design enables automatic temperature-based adjustment

38×38×28 mm 4-wire PWM 12 V fan

The unit measures 38 mm by 38 mm by 28 mm and draws 1.02 A at 12 V. A four-wire PWM connection allows the motherboard to control speed precisely. It is designed as an internal cooling component for compact builds.

Suited for small-form-factor cases and custom loops

Buyers who need a larger frame, higher airflow or a different voltage should look elsewhere. The 3828 frame size and 4-wire PWM interface limit drop-in replacement options. No other mounting pattern or connector type is supported.

Highlights

  • 12V PWM control for precise fan speed regulation
  • 38×38×28 mm form factor fits compact chassis builds
  • 02 A current rating delivers strong airflow performance
  • Four-wire design enables automatic temperature-based adjustment

Specifications

No published specifications for this item yet.

Questions about this item

Will the 38 mm square frame and 28 mm depth fit in the same mounting holes as my older 38 mm fan?

The fan uses a 38 mm by 38 mm frame with a 28 mm depth, so it matches other 38 mm square fans that share the same hole spacing.

How can I confirm the 4-wire PWM control is working after I connect it to a 12 V header?

The motherboard should report a fan speed reading and let you set a duty cycle curve; the fan will then spin up and down according to that curve.

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