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Two black 40 by 20 millimetre case fans with three-pin connectors

Zyvpee

Zyvpee DS04020B12S 40x20mm 12V 3-pin 2-pack case fan

SKU CH-7394-8QEGZ

Two 40 x 20 mm 12 V ball-bearing fans with 3-pin connectors, each spinning below 1600 RPM for compact case cooling

  • TypeCPU Cooler Fan
  • Bearing TypeBall
  • RPM<1600 RPM
  • Power Connector3 Pin
  • ColorBlack
  • LEDNon-LED
  • Compact 40×20 mm footprint fits tight chassis spaces
  • Ball-bearing motor rated below 1600 RPM for quiet operation
  • 12 V, 0.4 A draw keeps power load low
  • Three-pin connector enables motherboard speed control
  • Twin-pack delivers matched airflow for balanced cooling

Compact 40x20mm 12V case fans for tight builds

This twin pack supplies two 40mm square by 20mm thick fans that run from a standard 12V three-pin header. The ball-bearing design suits small-form-factor cases, GPU coolers or industrial enclosures where a slim 4020 profile is the only fit.

Ball-bearing operation below 1600 RPM at 0.4A draw

Each unit spins under 1600 RPM while pulling 0.4A from the 12V rail, keeping acoustic output modest in confined airflow paths. The three-wire connector reports speed to the motherboard so fan curves can react to actual load without PWM control.

Buyers needing PWM speed control

These fans use a fixed three-pin interface without a fourth PWM wire, so the motherboard can only vary voltage for speed changes. Systems that require closed-loop PWM regulation or higher static pressure than a 4020 frame can deliver will not match this kit.

Highlights

  • Compact 40×20 mm footprint fits tight chassis spaces
  • Ball-bearing motor rated below 1600 RPM for quiet operation
  • 12 V, 0.4 A draw keeps power load low
  • Three-pin connector enables motherboard speed control
  • Twin-pack delivers matched airflow for balanced cooling

Specifications

Brand3ccooler.com
SeriesDS04020B12S -109
ModelDS04020B12S
TypeCPU Cooler Fan
Bearing TypeBall
RPM<1600 RPM
Power Connector3 Pin
ColorBlack
LEDNon-LED
Dimensions40*20mm

Questions about this item

How do I connect the 3-pin 12V 0.4A power connector to my motherboard?

Align the three pins with the motherboard header, noting the keyed guide pin; the third wire carries the tachometer signal so the BIOS can report speed.

When should I expect the ball bearing to need replacement?

The ball bearing is rated for long continuous operation; plan to swap fans if RPM drops well below 1600 or noise increases noticeably.

At what RPM does airflow become insufficient for sustained loads?

The fan tops out at 1600 RPM; under heavy sustained heat the fixed speed may limit cooling before the bearing wears.

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