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Five black 40x40x28 mm server fans with 4-pin connectors

ARCTIC

ARCTIC S4028-6K 40x40x28 mm Server Fan 5 Pack

SKU CH-FYEW-RRJM0

A five-pack of 40 mm dual-ball-bearing server fans with 250–6000 RPM PWM control, 4.2 mm/H₂O static pressure and 12.06 m³/h airflow for 1U racks and compact enclosures

  • Dual ball bearings extend lifespan and resist heat and dust
  • Wide 250-6000 RPM PWM range balances cooling power and noise
  • 2 mm/H2O static pressure and 12.06 m³/h airflow suit radiator and case use
  • Fits 1U servers, routers, switches, NAS, DVRs, Mini PCs, HTPCs and 3D printers
  • Standard 4-pin connector works with 2-pin or 3-pin headers and 40 cm cable gives positioning flexibility

Compact Server Cooling

This five-pack of ARCTIC S4028-6K fans delivers 40x40x28 mm cooling for 1U server cases, routers, switches and NAS units. Each unit runs on 12 V DC with a standard 4-pin PWM connector and 40 cm cable, allowing voltage or PWM speed control from 250 to 6000 RPM. The dual ball-bearing impeller resists heat and dust for extended service life in rack environments.

Fit and Limits

System builders maintaining rack-mount gear, DVRs, Mini PCs, HTPCs, drive enclosures or 3D printers will find the 4.2 mm/H2O static pressure and 12.06 m³/h airflow a versatile match for both radiator and case roles. The 4-pin header also works on 2-pin or 3-pin connectors, simplifying drop-in replacement. Buyers needing larger frame dimensions, higher maximum static pressure for dense fin stacks, or addressable lighting should consider other form factors.

Speed Range Decides

The 250 to 6000 RPM range is the single figure that determines whether this fan meets a build's thermal and acoustic targets. Lower-bound speed sets idle noise floor, while the 6000 RPM ceiling defines peak airflow and pressure headroom for 1U clearance slots.

Highlights

  • Dual ball bearings extend lifespan and resist heat and dust
  • Wide 250-6000 RPM PWM range balances cooling power and noise
  • 2 mm/H2O static pressure and 12.06 m³/h airflow suit radiator and case use
  • Fits 1U servers, routers, switches, NAS, DVRs, Mini PCs, HTPCs and 3D printers
  • Standard 4-pin connector works with 2-pin or 3-pin headers and 40 cm cable gives positioning flexibility

Specifications

No published specifications for this item yet.

Questions about this item

What comes in the 5-pack and is anything else needed to install them?

The pack contains five 40x40x28 mm server fans, each with a 40 cm cable and standard 4-pin connector that also works on 2-pin or 3-pin headers. No extra parts are required for installation.

Which version should I choose for a 1U server that needs strong static pressure?

The S4028-6K delivers 4.2 mm/H₂O static pressure and 12.06 m³/h max airflow at 6000 RPM, making it suitable for 1U server cases, routers, switches and NAS units.

What does the 6000 RPM top speed mean for actual cooling and noise?

The wide 250-6000 RPM range is PWM- and voltage-regulated, so the fan can run quietly at low speed or ramp up for higher cooling performance when the system demands it.

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