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Small black square 40mm case fan with double ball bearing

Fans

Fans DB04028B12U 4028 12V .66A 40x40x28mm case fan

SKU CH-RS5Q-XYP3B

12 V double ball-bearing case fan with 40 × 40 × 28 mm dimensions and .66 A draw for 1U server chassis cooling

  • Double ball bearing design reduces wear for longer service life
  • 12 V .66 A rating matches standard 1U server power headers
  • 40 x 40 x 28 mm footprint fits tight 1U chassis slots
  • DB04028B12U model built for continuous server cooling duty

40 mm double ball bearing case fan

This 40 mm case fan uses double ball bearings and runs on 12 V at 0.66 A. The 4028 frame measures 40 by 40 by 28 mm and is built for 1U server chassis installations. It is supplied new and ready to mount in compatible bays.

Suits 1U server builds needing a 40 mm replacement

This fan fits 1U server chassis and other systems that accept a 40 by 40 by 28 mm frame with a 12 V 0.66 A power draw. It is not suited for builds requiring larger fan frames, different voltage ratings, or alternative bearing types. Buyers needing higher airflow specifications or PWM control should look elsewhere.

How it compares

Measured against everything we stock in PC Cooling Fans, at today’s prices. Recalculated every night.

Price $11.99
Cheaper than about 85% of the 8,339 comparable items (median $19.99).

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Specifications

No published specifications for this item yet.

Questions about this item

What are the mounting hole dimensions for this 40 mm square fan?

The fan measures 40 mm by 40 mm, matching standard 40 mm mounting patterns used in 1U server chassis and tight enclosures.

How do I connect the power leads on this 12 V .66 A fan, and what mistake should I avoid?

Connect the two wires to a 12 V header observing polarity; the common error is reversing them, which prevents the double ball bearing motor from starting.

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