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Small 4020 case fan with black plastic frame and three wires

Fans

Fans 4020 12V .10A 3-wire Dual Ball case fan

SKU CH-4MYN-2HNAP

40 mm dual-ball-bearing case fan runs on 12 V and draws 0.10 A with a three-wire connection

  • 12 V power supply simplifies installation
  • 10 A draw keeps energy use low
  • 4020 frame fits tight 4 cm spaces
  • 3-wire connector enables speed monitoring

Compact 12 V 3-wire fan

This 4020 form-factor case fan runs on 12 V and draws 0.10 A through a three-wire connection. Dual ball bearings support continuous operation in tight chassis spaces. It suits builders adding targeted airflow to small-form-factor or embedded systems.

Practical limits of the 3-wire interface

The three-wire design reports speed but does not accept PWM control signals. Voltage regulation is the only way to vary fan speed. Systems without voltage-controlled headers will run the fan at full speed continuously.

How it compares

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

Price $12.99
Cheaper than about 80% 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

Which 4020 version fits a 12 V header with a 0.10 A draw?

The DS04020B12L model is built for 12 V operation at 0.10 A, matching that header exactly.

What does the 3‑wire connection provide once the fan is installed?

The third wire carries a tachometer signal so the motherboard can monitor and report the fan’s actual speed.

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