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Small black 40mm cooling fan with three‑pin connector

OEM Industries

OEM Industries P1124020MB1A 40mm 12V 1.2W 3Pin CPU cooler

SKU CH-9W29-WSEMD

A 40mm 12V ball-bearing fan with a 3-pin connector for 2950 and 2950-24 switches

  • Fan size40 mm
  • Bearing designBall
  • Power input connector3 Pin
  • Product colorBlack
  • Product typeFan only
  • Compact 40 mm fan fits tight server chassis
  • Ball-bearing design extends operational lifespan
  • 12 V 100 mA draw keeps power use low
  • Three-pin connector enables speed monitoring
  • Built for 2950 and 2950-24 switch cooling

40 mm 12 V ball-bearing fan

This 40 mm fan runs on 12 V DC and draws 100 mA for a 1.2 W power rating. It uses a three-pin connector and a ball-bearing design without any LED lighting. The black frame measures 40 mm by 20 mm and is identified by part number P1124020MB1A.

Direct replacement for 2950-24 switch cooling

The unit is specified as a cooling fan for 2950 and 2950-24 network switches. It matches the original PSC 4020 form factor and three-wire interface. Swapping the old fan with this model restores airflow without rewiring or adapter cables.

Suited for maintainers of 2950 series hardware

Technicians servicing 2950 or 2950-24 switches can use this fan as a like-for-like spare. Builders needing PWM control, larger frame sizes, or higher static pressure should look at other cooling solutions.

How it compares

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

Price $23.99
Pricier than about 68% of the 1,559 comparable items (median $19.99).
Fan size 40 mm
Lower than about 90% of the 812 comparable items (median 80 mm).

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Specifications

Product
Brand namePI124020MB1A
Model nameP1124020MB1A
Product colorBlack
Product typeFan only
Power
Power input connector3 Pin
Size & build
Fan size40 mm
Bearing designBall
More details
LED lightingNo

Questions about this item

Will the 40 mm frame and 3-pin connector fit the fan header on a 2950-24 switch?

The fan measures 40 mm square and uses a standard 3-pin power connector that matches the header on the 2950-24 switch chassis.

How do I install the fan in the switch, and what step is often missed?

Slide the fan into the switch fan tray, align the screw holes, secure with the four mounting screws, then plug the 3-pin connector into the board header; the step often missed is fully seating the connector so the latch clicks.

What maintenance will the ball-bearing fan need over time?

The ball-bearing design is sealed and rated for continuous operation; no lubrication is required, but dust should be blown out of the 40 mm blades periodically to maintain airflow.

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