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Brown square 140mm case fan with 25mm thick frame and 3-pin connector

Noctua

Noctua NF-A14 FLX 140mm 3-Pin Case Fan Brown

SKU CH-VEC9-C5J35 MPN NF-A14 FLX

Premium quiet 140mm case fan with three speed settings via low-noise adaptors for radiators or chassis cooling

  • Fan size140 mm
  • Number of fans1 Fan
  • Fan controlNo Controller
  • Fan depth25 mm
  • Bearing designSSO2-Bearing (Self-stabilising oil-presure bearing)
  • Rotational speed1,200 RPM +/-10% 1,050 RPM +/-10% (with L.N.A adapter) 900 R

Model FLX

  • 140mm square frame fits radiators and cases perfectly
  • SSO2 bearing with metal shell ensures >150,000h MTTF reliability
  • Three speed settings via L.N.A. and U.L.N.A. adaptors
  • Airflow up to 115.5 m³/h at 19.2 dB(A)
  • Anti-vibration pads and stepped inlet reduce turbulence noise

140mm square frame quiet fan

The Noctua NF-A14 FLX is a 140mm case fan with a square frame designed for water-cooling radiators and chassis ventilation. It uses an SSO2 bearing and advanced aerodynamic features to deliver premium quiet cooling performance. The 3-pin connector provides broad compatibility with motherboards and power supplies.

Builders needing 140mm radiator or case cooling

This fan suits builders who want a single 140mm fan for radiator or case use with three selectable speed settings via the included adaptors. It is not for systems that require PWM speed control or fans with integrated RGB lighting.

3-pin connector with three fixed speed options

The FLX version ships with Low-Noise and Ultra-Low-Noise adaptors that set the fan to 1200, 1050 or 900 RPM without motherboard PWM control. Maximum airflow reaches 115.5 m3/h at 19.2 dB(A), while the ultra-low setting drops to 13.8 dB(A) at 88.7 m3/h.

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 140 mm
Higher than about 80% of the 1,114 comparable items (median 120 mm).

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Specifications

Product
Brand nameNoctua
Model nameNF-A14 FLX
Product typeCase Fan
Product colorBrown
Performance
Rotational speed1,200 RPM +/-10%
1,050 RPM +/-10% (with L.N.A adapter)
900 RPM +/-10% (With U.L.N.A)
Airflow rate115.5 m3/h (standard)
101.9 m3/h ( w/L.N.A. )
88.7 m3/h ( w/U.L.N.A. )
Power
Power input connector3 Pin
Size & build
Fan size140 mm
Number of fans1 Fan
Fan depth25 mm
Bearing designSSO2-Bearing (Self-stabilising oil-presure bearing)
Product dimensions140 × 140 × 25 mm
Shipping weight0.37 kg
Package size241 × 174 × 36 mm
Compatibility
Compatible withCPU Cooler, Water-Cooling Radiator and Case
Environment & compliance
Operating noise19.2 dB(A) standard
16.4 dB(A) (w/ L.N.A )
13.8 dB(A) (w/U. L.N.A )
More details
Fan controlNo Controller
LED lightingNo

Other versions of this model

2 more in the same range

Questions about this item

How loud is the NF-A14 FLX at 1200 RPM during continuous operation?

At the standard 1200 RPM setting the fan produces 19.2 dB(A). With the supplied Low-Noise Adaptor it drops to 16.4 dB(A) at 1050 RPM, and the Ultra-Low-Noise Adaptor brings it down to 13.8 dB(A) at 900 RPM.

Does the 3-pin connector require a PWM header or can it run from a standard motherboard fan header?

The fan uses a 3-pin Molex connector and includes a 3:4-pin adaptor, so it can be powered from a regular 3-pin or 4-pin motherboard header or directly from a power supply.

Will the 140 mm square frame with 124.5 mm mounting holes line up with my existing 140 mm radiator or case mounts?

Yes. The square 140 mm frame matches the 124.5 mm hole spacing used on standard 140 mm radiators and case fan positions, ensuring full coverage and secure mounting.

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