R121225BHAF63MAR
120 mm fan with two-ball bearings and PWM speed control.
- Size class
- 12025
- Nominal speed
- 800–2300 RPM
- Bearing
- Two ball
DC Cooling Fans
We supply DC cooling fans for standalone orders and liquid-cooling projects. Compare the model specifications, then send your quantity, mounting and control requirements for a quotation.
Compare DC Fan Models
Compare five 12V models from 70 mm to 140 mm by size, control behaviour and air performance. Each model has its own downloadable specification.
R121225BHA
R121225SUAF63MAR
120 mm fan with EBR bearings and stop operation at 0% PWM.
- Size class
- 12025
- 100% PWM speed
- 3000 RPM
- 0% PWM state
- Stopped
Engineering drawing from the manufacturer specification.
F128038BMAF8F6AR
80 × 80 × 38 mm fan with two-ball bearings and a higher static-pressure rating.
- Dimensions
- 80 × 80 × 38 mm
- Nominal speed
- 3500–12000 RPM
- Bearing
- Two ball
Four-colour cable shown. See the wiring note below before ordering.
R127015BMAF1J7AR
70 mm fan with two-ball bearings, PWM control and FG speed feedback.
- Dimensions
- 70 × 70 × 15.4 mm
- Nominal speed
- 1000–4000 RPM
- Bearing
- Two ball
FB14025BUAF2X4AR
140 mm fan with two-ball bearings, PWM control and FG speed feedback.
- Dimensions
- 140 × 140 × 25 mm
- Nominal speed
- 700–2600 RPM
- Bearing
- Two ball
| Specification | R121225BH | R121225SU | F128038BM | R127015BMA | FB14025BUA |
|---|---|---|---|---|---|
| Rated voltage | 12V DC | 12V DC | 12V DC | 12V DC | 12V DC |
| Airflow at zero static pressure | 76.21 CFM | 99.41 CFM | 99.70 CFM | 27.41 CFM | 122.97 CFM |
| Static pressure at zero airflow | 3.02 mmH₂O | 5.14 mmH₂O | 49.75 mmH₂O | 3.76 mmH₂O | 5.14 mmH₂O |
| Sound pressure / maximum | 35 / 38 dB(A) | 43 / 45 dB(A) | 64 / 66 dB(A) | 36 / 38 dB(A) | 44 / 47 dB(A) |
| Rated / maximum power | 3 / 3.6W | 4.2 / 4.8W | 21.6 / 24W | 2.4 / 3W | 5.4 / 6.6W |
| 0% PWM state | 800 RPM nominal | Stopped | 3500 RPM nominal | 1000 RPM nominal | 700 RPM nominal |
Manufacturer specification values at 100% PWM unless a different duty cycle is stated. Airflow and static pressure are separate curve endpoints. Sound pressure uses the manufacturer’s 1 m test setup. “12025” identifies the size class; complete thickness and tolerances are in the drawings. Speed ranges above show nominal control endpoints; use the PDF and agreed specification for acceptance limits.
Airflow and Static Pressure
Similar free-air flow does not mean the same performance against system resistance. Static pressure, noise and power also differ.
R121225SUAF63MAR
99.41 CFM at zero static pressure, with a 5.14 mmH₂O zero-flow static-pressure rating. Rated power is 4.2W.
F128038BMAF8F6AR
99.70 CFM at zero static pressure, with a 49.75 mmH₂O zero-flow static-pressure rating. Rated power is 21.6W.
These are manufacturer curves, shown with their own axis scales. Actual airflow in a radiator or enclosure depends on the installed system resistance. The PDFs include test conditions and complete performance information.
Mounting Dimensions and PWM Control
Review the complete drawing for frame thickness, mounting holes, cable assembly and connector orientation.
The SU model stops at 0% PWM. The BH, 8038, 7015 and 14025 models continue to run at their specified low-speed settings. All five specifications include FG speed feedback; connector and pin definitions are model-specific.
The F128038BM product photos show the four-colour cable configuration we offer. The F128038BMAF8F6AR reference PDF shows an all-black harness on page 7. Specify the pictured cable configuration when ordering; the cable assembly and pin assignment will be confirmed with the quotation.
R121225BHAF63MAR
Dimensions and cable drawing
R121225SUAF63MAR
Dimensions and cable drawing
F128038BMAF8F6AR
Dimensions and cable drawing
R127015BMAF1J7AR
Dimensions and cable drawing
FB14025BUAF2X4AR
Dimensions and cable drawing
Fan Orders and Custom Configurations
Send a model and quantity for a quotation, or describe the installation and electrical configuration your project needs.
Order by part number
Specify the full model code and required document revision. Sample and production quantities can be included in the same inquiry.
- Model and quantity
- Delivery destination and timing
- Required drawing or inspection documentation
Discuss cable and installation needs
Share cable length, connector, pin assignment and mounting requirements. We will discuss supported changes for the selected model.
- Supply voltage and PWM / FG interface
- Frame space, mounting holes and airflow direction
- Target airflow, system resistance and noise limits
Download Product Specifications
Get the original PDF for each model directly. No sign-in or inquiry form is required.
R121225BHAF63MAR
Manufacturer specification · Rev B · 2025-09-13 · 28 pages · PDF 5.2 MB
R121225SUAF63MAR
Manufacturer specification · Rev A · 2024-10-17 · 28 pages · PDF 4.2 MB
F128038BMAF8F6AR
Manufacturer specification · Rev A · 2025-04-17 · 29 pages · PDF 4.1 MB
Reference PDF: page 7 shows an all-black harness. Product photos show the four-colour cable configuration.
R127015BMAF1J7AR
Manufacturer specification · Rev A · 2024-12-28 · 29 pages · PDF 5.8 MB
FB14025BUAF2X4AR
Manufacturer specification · Rev A (history A-2) · 2025-10-20 · 29 pages · PDF 7.8 MB
Original manufacturer documents, including drawings, control information and test conditions. Match the complete part number and revision to your requested configuration.
DC Cooling Fan FAQs
Answers about ordering, control and the technical information available for your project.
Can I order fans separately from a cooling module?
Yes. Send the full part number and quantity for a standalone quotation. Complete cooling-module and workstation projects can also be discussed.
What is the difference between the two 120 mm models?
The BH model uses two-ball bearings and runs at 800–2300 RPM nominal. The SU model uses EBR bearings, stops at 0% PWM and reaches 3000 RPM nominal at 100% PWM. Their air performance, power and noise ratings differ.
Does every PWM fan stop at 0% duty cycle?
No. Among these five models, the SU specification provides stop operation at 0% PWM. The BH, 8038, 7015 and 14025 specifications retain a low-speed operating state.
Are the four-pin connectors interchangeable?
Do not assume interchangeability from the pin count. Use the connector, pin assignment and viewing direction in each model’s drawing, and include your required interface when enquiring.
Can I download a specification before requesting a quote?
Yes. All five original specification PDFs are available in the download section without submitting a form. For the 8038 cable configuration, also read the wiring note above.