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Black square 120mm NIDEC fan 38mm thick 2-wire 24V 0.41A

OEM Industries

OEM Industries B34978-55 12038 24V .41A 2-Wire CPU cooler

SKU CH-3S0Y-RQTNA

120 mm square fan with ball bearing runs on 24 V at 0.41 A via two wires

  • ColorBlack
  • TypeFan only
  • Fan Size120mm
  • Bearing TypeBall
  • LEDNo
  • 120 mm square frame fits standard mounting holes
  • NIDEC 12038 ball-bearing motor runs at 24 V 0.41 A
  • Two-wire power connection simplifies installation
  • 38 mm thick profile delivers high static pressure
  • Black finish matches most chassis aesthetics

Nidec 12038 square fan for 24 V systems

This 120 mm by 38 mm square cooler from Nidec runs on 24 V at 0.41 A and uses a two-wire connection. It is built as a fan-only unit with ball-bearing construction and no LED lighting. The black frame suits industrial or server chassis that require a compact 12038 form factor.

Two-wire power simplifies wiring in rack mounts

The 2-wire lead delivers power without a separate tach or PWM line, so installation is a single plug into a 24 V header or terminal block. Ball bearings reduce friction compared with sleeve types, extending service life in continuous-operation environments. No bundled software or accessories are included beyond the fan itself.

Ball-bearing motor and 38 mm depth fit tight bays

The 38 mm thickness matches standard 12038 mounting holes, allowing drop-in replacement for legacy Nidec B34978-55 units. Ball-bearing design tolerates higher ambient temperatures than sleeve equivalents, and the two-wire interface avoids the need for fan-speed reporting headers. Buyers who need PWM speed control or a three-wire tach signal cannot use this model.

Points forts

  • 120 mm square frame fits standard mounting holes
  • NIDEC 12038 ball-bearing motor runs at 24 V 0.41 A
  • Two-wire power connection simplifies installation
  • 38 mm thick profile delivers high static pressure
  • Black finish matches most chassis aesthetics

Caractéristiques

ModelB34978-55
ColorBlack
TypeFan only
Fan Size120mm
Bearing TypeBall
LEDNo

Questions sur cet article

Will the ball bearing in this 12038 fan need lubrication or replacement?

The ball bearing is sealed and rated for continuous operation without scheduled lubrication; replacement is only needed if noise or vibration increases after extended use.

What thermal limit appears first when this 24 V .41 A cooler runs continuously?

The motor’s 24 V 0.41 A rating sets the sustained power ceiling; exceeding the designed airflow envelope causes temperature rise before any electrical limit trips.

How loud and hot does the B34978-55 get during all-day operation?

With a 120 mm frame and 38 mm depth, the fan moves air at its rated 24 V current, producing moderate airflow noise and minimal heat from the motor itself.

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