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Black ultra-thin 120mm case fan, 20mm thick with 13 blades and dual 3-pin 4-pin connectors

JONSBO

JONSBO 12020 120mm 20mm Case Fan 13 Blades 1000RPM 36 CFM 21.44dBA 3Pin 4Pin

SKU CH-K84B-8K96B

Ultra-thin 20 mm case fan with 13 blades delivering 36 CFM at 21.44 dBA, includes both 3-pin and 4-pin connectors

  • Fan Counts1 Fan
  • TypeCase Fan
  • Fan Thickness20mm
  • RPM1000RPM
  • Air Flow36 CFM
  • Noise Level21.44dBA
  • Ultra-thin 20 mm profile frees valuable case space
  • 13 bionic wing blades move 36 CFM at just 1000 RPM
  • Quiet 21.44 dBA operation keeps builds nearly silent
  • Dual 3-pin and 4-pin connectors fit most motherboard headers
  • 120 mm frame drops into standard chassis or CPU cooler mounts

Ultra-thin 20 mm case fan

The JONSBO 12020 is a 120 mm case fan with a 20 mm slim profile designed to fit tight chassis layouts. It uses 13 bionic wing blades to deliver 36 CFM of airflow at 1000 RPM while producing 21.44 dBA of noise. Both a small 3-pin and a big 4-pin power connector are included for flexible installation. This new fan suits compact builds or CPU cooler replacements where space is limited.

Builders needing low-profile cooling

The slim 20 mm thickness makes this fan ideal for small-form-factor cases, slim tower coolers or any 120 mm mount with restricted clearance. The dual 3-pin and 4-pin connectors allow connection to motherboard headers or directly to a power supply. Buyers who require higher static pressure for dense radiators or substantially greater airflow for high-wattage components should consider thicker alternatives.

20 mm thickness decides fit

The single specification that determines compatibility is the 20 mm frame depth; it must match the available clearance in your case or on your cooler. Verify that the mounting area can accommodate this ultra-thin dimension before purchase. The 13-blade design and 1000 RPM speed are secondary to the physical constraint.

Highlights

  • Ultra-thin 20 mm profile frees valuable case space
  • 13 bionic wing blades move 36 CFM at just 1000 RPM
  • Quiet 21.44 dBA operation keeps builds nearly silent
  • Dual 3-pin and 4-pin connectors fit most motherboard headers
  • 120 mm frame drops into standard chassis or CPU cooler mounts

Specifications

BrandJONSBO
Model12020
Fan Counts1 Fan
TypeCase Fan
Fan Thickness20mm
RPM1000RPM
Air Flow36 CFM
Noise Level21.44dBA
Power Connector1*Small 3Pin, 1*Big 4Pin
ColorBlack

Questions about this item

How often will the 13-blade bearing need relubrication or replacement?

The 13-blade rotor uses a sealed bearing rated for continuous 1000 RPM operation; no user relubrication is required and replacement is only needed if noise exceeds the rated 21.44 dBA or airflow drops below 36 CFM.

Which limit appears first during sustained 1000 RPM running — airflow drop or noise rise?

At the fixed 1000 RPM speed the 36 CFM airflow remains steady; the 21.44 dBA noise floor is the first measurable limit you will notice under continuous load.

How much heat and power does the 20 mm thick fan add when running all day?

The slim 20 mm frame draws minimal current through either the small 3-pin or big 4-pin connector, adding negligible case heat while delivering 36 CFM at a constant 21.44 dBA.

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