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Black 120mm axial fan, four-wire connector, no LED

OEM Industries

OEM Industries 4112N/31HHA 120mm Fan 4-Wire 18W

SKU CH-N4RD-JM3MG

A 120 mm dual-ball-bearing fan with a 4-wire PWM connector and 18 W power draw

  • Fan size120 mm
  • Bearing design2 Ball
  • Power input connector4 Wires
  • Product colorBlack
  • Product typeFan only
  • 120 mm fan fits standard CPU cooler mounts
  • 4-wire PWM connector enables precise speed control
  • Dual ball bearing design extends operational lifespan
  • 18 W power rating delivers strong airflow performance
  • ebm-papst engineering ensures reliable cooling quality

120mm 4-Wire Server Fan

The OEM Industries 4112N/31HHA is a 120mm fan built for server and workstation chassis that require a standard 4-wire PWM connection. Its dual ball bearing construction targets continuous duty cycles in rack environments. The unit draws 18W at 12V DC and matches the IBM 07K7056 part reference for direct replacement.

Ball Bearing Thermals and Acoustics

Dual ball bearings sustain steady airflow at high static pressure while keeping rotational friction predictable over long deployments. The 4-wire interface allows the host system to modulate speed under varying thermal loads, reducing acoustic output during idle periods. Power draw remains fixed at 18W when running at full voltage.

Drop-In Replacement Simplicity

No LED lighting or extra cabling is included, so the fan installs directly into existing 120mm mounts using the native 4-pin header. The black frame matches typical server aesthetics without requiring bracket adapters. Buyers needing RGB illumination or 3-pin voltage control should look elsewhere.

How it compares

Measured against everything we stock in CPU Coolers & Heatsink Fans, at today’s prices. Recalculated every night.

Price $86.99
Pricier than about 91% of the 1,559 comparable items (median $19.99).
Fan size 120 mm
Higher than about 80% of the 812 comparable items (median 80 mm).

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Specifications

Product
Model name4112N/31HHA
Product colorBlack
Product typeFan only
Power
Power input connector4 Wires
Size & build
Fan size120 mm
Bearing design2 Ball
More details
LED lightingNo

Questions about this item

How do I connect the 4-wire PWM connector to my motherboard header?

Align the keyed 4-wire plug with the CPU fan header and press straight down; the fourth wire carries the PWM signal so speed control works automatically.

When will the dual ball bearings need replacement?

The 2-ball bearing design is rated for long life; listen for increased noise or vibration as the first sign that the fan should be swapped.

What thermal limit appears first during continuous 18 W operation?

Sustained 18 W draw heats the motor windings; the internal thermal cutoff will reduce speed before any component reaches its maximum temperature.

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