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Small black 4 cm square case fan with visible blades and wire lead

Fans

Fans MGT4012UB-R20 4020 0.30A 12V 4 cm switch fan

SKU CH-NSF3-C92N6

A 4 cm case fan running on 12 V with a 0.30 A draw and a 4020 form factor

  • 12 V power supply simplifies wiring
  • 30 A draw keeps energy use low
  • 40 mm frame fits tight chassis spaces
  • Switch function allows manual speed control

4 cm 12 V switch fan

The Fans MGT4012UB-R20 is a compact 40 mm square case fan that runs on 12 V and draws 0.30 A. Its 4020 frame profile fits tight chassis spaces where larger fans cannot be mounted. The integrated switch lets you power the fan on or off without software control.

Ideal for small-form-factor builds

Builders who need higher airflow or PWM speed regulation should look elsewhere, as this model provides fixed-speed operation only. It also suits single-fan mounting points rather than dual-fan radiator setups.

How it compares

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

Price $13.99
Cheaper than about 70% 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

Does the MGT4012UB-R20 need a 12 V header on my motherboard or controller?

Yes, the fan is rated for 12 V and draws 0.30 A, so it must be connected to a 12 V fan header or compatible controller.

Will this 4020 switch fan work if I keep my existing 3-pin fan headers?

It will run at full speed on a 3-pin header because voltage control still applies; only PWM speed regulation requires a 4-pin header.

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