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Small black 40mm square fan with four-pin connector

OEM Industries

OEM Industries 4020 CHA4012EB-MAH-O (E) 40mm 12V 0.24A 4 Pin CPU cooler

SKU CH-T9JD-Q1Z8X

A 40 mm ball-bearing case fan with a 4-pin PWM connector runs at 12 V and 0.24 A for compact CPU cooling

  • ColorBlack
  • TypeFan only
  • Fan Size40mm
  • Bearing TypeBall
  • Power Connector4 Pin
  • LEDNon-LED
  • Compact 40mm square profile fits tight builds
  • Ball bearing ensures durable long-life operation
  • 12V 0.24A delivers efficient cooling power
  • 4-pin PWM connector enables precise speed control
  • Non-LED black design suits clean professional aesthetics

Compact 40 mm CPU cooler

The OEM Industries CHA4012EB-MAH-O(E) is a square 40 mm fan-only cooler designed for tight chassis where a low-profile air solution is required. It draws 12 V at 0.24 A through a standard 4-pin PWM connector and uses a ball-bearing motor for continuous operation. The non-LED black frame keeps the appearance neutral for workstation or embedded builds.

Check motherboard header and mounting holes

Verify that your board provides a 4-pin CPU fan header within reach of the short lead. Confirm the mounting pattern matches the 40 mm square footprint; some mini-ITX or proprietary boards use different hole spacing. Ensure the case allows at least 20 mm of vertical clearance above the socket for the fan housing.

Ball-bearing durability and 4-pin control

The ball-bearing design resists dust ingress and maintains consistent speed over long duty cycles in industrial or always-on systems. Four-wire PWM lets the motherboard regulate speed precisely, reducing noise at idle while delivering full airflow under load. The bare fan construction means you can reuse existing retention brackets or custom mounts without proprietary clips.

Punti di forza

  • Compact 40mm square profile fits tight builds
  • Ball bearing ensures durable long-life operation
  • 12V 0.24A delivers efficient cooling power
  • 4-pin PWM connector enables precise speed control
  • Non-LED black design suits clean professional aesthetics

Caratteristiche tecniche

ModelCHA4012EB-MAH-O(E)
ColorBlack
TypeFan only
Fan Size40mm
Bearing TypeBall
Power Connector4 Pin
LEDNon-LED

Domande su questo articolo

Does the 40mm cooler include mounting hardware or only the fan?

The specification lists the type as fan only, so the package contains the 40mm ball-bearing fan with a 4-pin connector and no separate mounting kit.

Is the 12V 0.24A 4-pin version the only option available for this model?

The product is offered as a single SKU — CHA4012EB-MAH-O(E) — rated at 12V 0.24A with a 4-wire 4-pin connector, so there are no alternative voltage or pin-count variants to choose from.

What does the 0.24A current draw mean for PWM control on a standard motherboard header?

At 0.24A the fan draws well within the typical 1A limit of a 4-pin CPU header, allowing full PWM speed regulation without overloading the motherboard fan controller.

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