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Small square black plastic 40mm case fan with centre hub and mounting holes

Fans

Fans 4028 PMD1204PQB1-A 12V 4W double ball bearing case fan 40x40x28mm

SKU CH-R7EG-032AM

A 12 V double ball-bearing case fan measuring 40 × 40 × 28 mm for compact server cooling

  • Double ball bearings extend operating life
  • 12 V DC input fits standard server headers
  • 40 × 40 × 28 mm form factor suits tight 1U chassis
  • 4 W draw keeps power budget low

Compact 40 mm server fan

The SUNON 4028 PMD1204PQB1-A is a 12 V case fan built for tight server and industrial chassis. Its 40 x 40 x 28 mm frame fits narrow bays where larger coolers cannot be mounted. Double ball bearings provide reliable rotation in continuous-duty environments. The unit draws 4 W and is supplied new from the manufacturer.

Upgrade from worn sleeve-bearing units

Replace ageing 40 mm fans that have developed rattle or reduced airflow after extended service. The ball-bearing design resists dust ingress and maintains consistent speed over long operating periods. The jump is worthwhile when system uptime matters and a drop-in 4028 form factor is required. Builders needing higher static pressure or larger frame sizes should look elsewhere.

Highlights

  • Double ball bearings extend operating life
  • 12 V DC input fits standard server headers
  • 40 × 40 × 28 mm form factor suits tight 1U chassis
  • 4 W draw keeps power budget low

Specifications

No published specifications for this item yet.

Questions about this item

What are the exact mounting dimensions for the 4028 fan?

The fan measures 40 mm by 40 mm with a thickness of 28 mm, matching the standard 4028 form factor for server and chassis mounting holes.

How do I correctly wire the PMD1204PQB1-A to a 12 V header?

Connect the red lead to 12 V and the black lead to ground; reversing the polarity will prevent the double ball bearing motor from starting.

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