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Brown 60mm square case fan 25mm thick with three-pin connector

Noctua

Noctua NF-A6x25 FLX 60mm 25mm 3-pin case fan

SKU CH-CQFN-K9F17 MPN NF-A6x25 FLX

A 60×25 mm case fan with SSO2 bearings offering 29.2 m³/h airflow at 19.3 dB(A), plus two adaptors for 1600–3000 RPM operation

  • Fan size60 mm
  • Number of fans1 Fan
  • Fan controlNo Controller
  • Fan depth25 mm
  • Bearing designSSO2
  • Rotational speedRotational Speed (+/- 10%): 3,000 RPM Rotational Speed with

LED Non-LED

Model FLX

  • Near-silent operation at 8.2 dB(A) with Ultra-Low-Noise Adapter
  • 2 m³/h maximum airflow for effective 60 mm cooling
  • Three selectable speeds via included Low-Noise and Ultra-Low-Noise Adapters
  • SSO2 bearing and Smooth Commutation Drive 2 for long-term stability
  • Anti-vibration pads and compensators reduce case resonance

Targeted compact cooling

The NF-A6x25 FLX is a 60mm square, 25mm thick case fan designed for tight spaces such as NAS units, DVRs, network gear and 3D printers. Its 3-pin connector and included 3:4-pin adaptor let it draw power from a motherboard header or directly from a PSU. The brown, non-LED frame fits unobtrusively into professional or industrial enclosures.

Three-speed airflow headroom

At full speed the fan moves 29.2 m³/h at 3000 RPM; the supplied Low-Noise Adaptor drops this to 23.5 m³/h at 2400 RPM, and the Ultra-Low-Noise Adaptor further reduces output to 16.7 m³/h at 1600 RPM. Builders can select the adaptor that matches the thermal load, but the 60mm form factor limits absolute airflow compared with larger fans.

Quiet operation and low power

Acoustic output measures 19.3 dB(A) at full speed, 14.5 dB(A) with the L.N.A. and 8.2 dB(A) with the U.L.N.A. The SSO2 bearing and Smooth Commutation Drive 2 keep running noise smooth across all three settings. Rated MTTF exceeds 150000 hours, indicating minimal power draw and long service life in continuous use.

How it compares

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

Price $17.99
Cheaper than about 57% of the 8,339 comparable items (median $19.99).
Fan size 60 mm
Lower than about 83% of the 1,114 comparable items (median 120 mm).

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Specifications

Product
Brand nameNoctua
Product lineA-Series
Model nameNF-A6 × 25 FLX
Product typeCase Fan
Product colorBrown
Performance
Rotational speedRotational Speed (+/- 10%): 3,000 RPM
Rotational Speed with L.N.A. (+/- 10%): 2,400 RPM
Rotational Speed with U.L.N.A. (+/- 10%): 1,600 RPM
Airflow rateAirflow: 29.2 m3/h
Airflow with L.N.A.: 23.5 m3/h
Airflow with U.L.N.A.: 16.7 m3/h
Power
Power input connector3 Pin
Size & build
Fan size60 mm
Number of fans1 Fan
Fan depth25 mm
Bearing designSSO2
Product dimensions60 × 60 × 25 mm
Shipping weight0.20 kg
Package size178 × 152 × 38 mm
In the box
In the boxLow-Noise Adapter (L.N.A.)
Ultra-Low-Noise Adapter (U.L.N.A.)
3:4-Pin Adaptor
30 cm Extension Cable
4 Vibration-Compensators
4 Fan Screws
Environment & compliance
Operating noiseAcoustical Noise: 19.3 dB(A)
Acoustical Noise with L.N.A.: 14.5 dB(A)
Acoustical Noise with U.L.N.A.: 8.2 dB(A)
More details
Fan controlNo Controller
LED lightingNon-LED

Other versions of this model

1 more in the same range

Questions about this item

Will this 60mm 3-pin fan fit the same mounting holes as my old 60mm fan?

Yes, the 60 x 60 x 25mm frame matches standard 60mm mounting, and the box includes four fan screws plus four vibration-compensators for a direct swap.

How do I confirm the fan is running at the chosen speed after installing the Low-Noise or Ultra-Low-Noise Adapter?

With the L.N.A. fitted the fan spins at 2400 RPM and 23.5 m3/h at 14.5 dB(A); with the U.L.N.A. it runs at 1600 RPM, 16.7 m3/h and 8.2 dB(A).

Does the package include everything needed to power the fan from a 4-pin Molex connector on my PSU?

The box contains a 3:4-pin adaptor, a 30cm extension cable, the L.N.A. and U.L.N.A. adapters, four vibration-compensators and four fan screws.

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