We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Small square 4020 case fan with black frame and transparent blades

Fans

Fans 4020 12V Speed Measurement Silent Fan JPD0402012MA3A11 case fan

SKU CH-57HC-K1SG1

4cm 12V case fan with speed measurement for quiet cabinet cooling

  • 12 V operation for stable power delivery
  • 4020 frame fits compact cabinet spaces
  • Speed measurement enables precise RPM monitoring
  • Silent design reduces audible noise levels

Compact 12V case fan with speed monitoring

This 4020 form-factor fan runs on 12 V and includes a tachometer output so the system can track rotor speed in real time. It is intended for tight chassis positions such as small-form-factor cases, server blades or industrial cabinets where a 40 mm frame is the only option. Builders who need active airflow in a restricted slot will find it a direct fit.

Steady airflow under continuous duty

The motor is rated for constant 12 V operation, so airflow remains stable during extended workloads rather than dropping off after a brief spin-up. Speed feedback lets the motherboard or fan controller adjust PWM curves to keep thermals in check without overshooting acoustic limits. It is not suited for builds that require larger-diameter fans or higher static pressure for dense radiator stacks.

Highlights

  • 12 V operation for stable power delivery
  • 4020 frame fits compact cabinet spaces
  • Speed measurement enables precise RPM monitoring
  • Silent design reduces audible noise levels

Specifications

No published specifications for this item yet.

Questions about this item

How loud is the 4020 fan when running continuously at 12V?

The 4020 12V fan is described as a silent model, designed for low-noise operation during extended use.

What power connector does the JPD0402012MA3A11 need to run?

It requires a standard 12V power connection compatible with typical computer cabinet fan headers.

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.