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Noctua NF-A12x25r 120mm round-frame fan in brown with black blades

Noctua

Noctua NF-A12x25r PWM 120mm Round Frame Case Fan Brown

SKU CH-Y6SH-Q9DS1

A round-frame 120mm PWM case fan with 0.5mm tip clearance, 2000 RPM maximum speed and 22.6 dB(A) noise rating

  • Fan Counts1 Fan
  • TypeCase Fan
  • Fan Thickness25mm
  • Bearing TypeSSO2
  • RPMmax. 2000 RPM
  • Noise Levelmax. 22.6 dB(A)
  • Round frame fits where square 120mm fans cannot
  • 5mm tip clearance enabled by Sterrox LCP material
  • Max 22.6 dB(A) at 2000 RPM with PWM control
  • Low-Noise Adaptor reduces speed to 1700 RPM
  • >150000 h MTTF backed by SSO2 bearing

Premium Quiet Cooling for Round-Frame Slots

The Noctua NF-A12x25r PWM is a 120mm case fan built with a round frame to fit low-height dual-tower CPU coolers such as the NH-D12L and other space-restricted mounts that cannot accept square 120mm fans. It targets builders who need premium quiet cooling in tight clearances. Buyers who require a standard square-frame 120mm fan should choose the NF-A12x25 instead.

Thermals Noise and Power Draw in Normal Use

The fan spins at up to 2000 RPM and produces a maximum noise level of 22.6 dB(A) while drawing power from a standard 4-pin PWM header for automatic speed control. A supplied Low-Noise Adaptor lowers the ceiling to 1700 RPM for even quieter operation. The SSO2 bearing and Sterrox LCP impeller with 0.5mm tip clearance deliver smooth airflow at modest power.

Sustained Load Behaviour

Under continuous load the motor maintains its rated speed without thermal throttling thanks to the metal-reinforced hub and bearing shell. The manufacturer rates the bearing lifetime at >150000 hours MTTF, indicating stable performance over years of constant running. Accessories include anti-vibration mounts, an extension cable and a y-cable for running two PWM fans on one header.

商品特色

  • Round frame fits where square 120mm fans cannot
  • 5mm tip clearance enabled by Sterrox LCP material
  • Max 22.6 dB(A) at 2000 RPM with PWM control
  • Low-Noise Adaptor reduces speed to 1700 RPM
  • >150000 h MTTF backed by SSO2 bearing

商品規格

BrandNoctua
SeriesNF-A12x25r
Fan Counts1 Fan
TypeCase Fan
Fan Thickness25mm
Bearing TypeSSO2
RPMmax. 2000 RPM
Noise Levelmax. 22.6 dB(A)
Power Connector4 Pin
ColorBrown

商品問答

How do I install the NF-A12x25r PWM fan in a round-frame mount, and what step do people often miss?

Mount the fan using the included anti-vibration mounts or screws through the round frame's mounting holes, then connect the 4-pin PWM connector to the motherboard header. The step often missed is attaching the Low-Noise Adaptor or Y-cable before finalising cable routing, which sets the 1700 RPM limit or enables dual-fan control.

What maintenance or replacement will the SSO2 bearing need over its 150000 hour MTTF rating?

The SSO2 bearing is self-lubricating and rated for over 150000 hours MTTF, so no routine maintenance is required. Replacement is only needed if noise increases or RPM drops below the 2000 RPM maximum after extended use.

At what point does the 22.6 dB(A) noise limit appear during sustained 2000 RPM operation?

The 22.6 dB(A) maximum is measured at the full 2000 RPM speed under steady load. Sustained operation at this speed reaches the acoustic limit immediately, while the Low-Noise Adaptor reduces it to 1700 RPM for quieter long-term running.

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