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Brown 120mm square case fan with black blades and 4-pin connector

Noctua

Noctua NF-S12A PWM 120mm 25mm 4-Pin Case Fan

SKU CH-NPZ8-MM8J1 MPN NF-S12A PWM

120mm PWM case fan with 1200 RPM maximum speed and 17.8 dB(A) noise level for quiet cooling

  • Fan Counts1 Fan
  • Fan ControllerNo Controller
  • TypeCase Fan
  • CompatibilityCPU Cooler, Water-Cooling Radiator and Case
  • Fan Thickness25mm
  • Bearing TypeSSO2

LED No

Model PWM

Doorgestreepte varianten bestaan wel, maar zijn hier niet op voorraad.

  • Quiet operation at 10.7 dB(A) with Low-Noise Adaptor fitted
  • 4-pin PWM enables automatic 300–1200 RPM speed control
  • 5 m³/h airflow for efficient case ventilation
  • SSO2 bearing rated beyond 150000 hours MTTF
  • Anti-vibration pads and mounts reduce transmitted vibration

Quiet 120mm PWM case fan

The Noctua NF-S12A PWM is a 120mm square, 25mm thick case fan designed for silent operation in desktop PCs. It uses a 4-pin PWM connector for automatic speed control and runs at a maximum of 1200 RPM with a noise level of 17.8 dB(A). The brown coloured fan includes anti-vibration pads and a Low-Noise Adaptor for quieter running.

Upgrade from louder or smaller fans

This model replaces older 120mm fans that lack PWM control or produce higher noise at similar airflow. The jump is worth it when building a quiet workstation or silencing an existing chassis where the fan will run continuously at low speeds. It is not suited for builds that require high static pressure for dense radiator fins or restrictive mesh panels.

Airflow capacity and limits

At full speed the fan delivers 107.5 m3/h of airflow, dropping to 83.2 m3/h with the Low-Noise Adaptor limiting speed to 900 RPM. The PWM range extends down to 300 RPM for near-silent idle. The SSO2 bearing is rated for over 150000 hours MTTF. It will not match the static pressure of dedicated radiator fans in high-restriction liquid cooling loops.

Pluspunten

  • Quiet operation at 10.7 dB(A) with Low-Noise Adaptor fitted
  • 4-pin PWM enables automatic 300–1200 RPM speed control
  • 5 m³/h airflow for efficient case ventilation
  • SSO2 bearing rated beyond 150000 hours MTTF
  • Anti-vibration pads and mounts reduce transmitted vibration

Specificaties

BrandNoctua
ModelNF-S12A PWM
Fan Counts1 Fan
Fan ControllerNo Controller
TypeCase Fan
CompatibilityCPU Cooler, Water-Cooling Radiator and Case
Fan Thickness25mm
Bearing TypeSSO2
RPM1200 RPM +/-10%
900 RPM +/-10% (with L.N.A adapter)
300 RPM +/-10% Min Rotation Speed (PWM)
Air Flow107.5 m3/h (standard)
83.2 m3/h (w/L.N.A.)
Noise Level17.8 dB(A) standard
10.7 dB(A) (w/ L.N.A)
Power Connector4 Pin
ColorBrown
LEDNo
FeaturesAward-winning S12 design
Anti-Stall Knobs
AAO Frame
Stepped Inlet Design
Inner Surface Microstructures
Integrated Anti-Vibration Pads
Custom designed PWM IC with SCD
Low-Noise Adaptor
Extensive Cabling Options
SSO2 Bearing
Metal bearing shell
Dimensions120 x 120 x 25mm
Verzendgewicht0.30 kg
Pakketafmetingen211 × 152 × 39 mm

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What are the exact dimensions and screw-hole spacing for mounting this 120mm fan?

The frame measures 120 x 120 x 25mm with standard 120mm mounting holes; four anti-vibration pads and four screws are included for case or radiator installation.

How do I connect the 4-pin PWM connector and the supplied Low-Noise Adaptor for automatic speed control?

Plug the fan's 4-pin connector into a motherboard PWM header; insert the Low-Noise Adaptor between fan and header to limit maximum speed to 900 RPM while retaining PWM control down to 300 RPM.

When should I expect to replace the SSO2 bearing, and what indicates it is wearing out?

The SSO2 bearing is rated for more than 150000 hours MTTF; rising noise above the specified 17.8 dB(A) or increased vibration suggests bearing wear and the need for replacement.

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