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Top-Motor DF128025BU-PWM - 4-pin Fan


  • Model: DF128025BU-PWM
  • Size: 80x80x25.4mm
  • Bearing System: Dual Ball
  • Rated Voltage: 12V
  • Speed: 4000 +/- 10% RPM
  • Air Flow: 48.50 CFM
  • Connector: 4pin

Stock Status: Stock Available

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Top-Motor 80 x 80 x 25 mm (LxWxH) DC Fan by Dynatron.
Voltage range with 12V and bearing System of Dual Ball. RPM (Revolutions Per Minute) fan speed ranges from 1800 rpm to 4000 rpm.
Connect with a 4 wired, 4-pin connector.
RoHS (Restriction of Hazardous Substances) Compliance.
  • Dimensions: 80 x 80 x 25 mm
  • Frame: PBT+30%GF UL94V-0 (Black)
  • Impeller: PBT+15%GF UL94V-0 (Black)
  • Weight: 9±2 grams
  • Design: Axial Fan
  • Operating Temperature: – 10 °C ~ + 65 °C (65 % RH)
  • Storage Temperature: – 30 °C ~ + 70 °C (65 % RH)
  • Connector: 4pin

*All product specifications and product images are subject to change without notice.
Rated Voltage:

12 V

Operating Voltage:

810.8 V~13.2 V

PWM Frequency 25KHz

Duty Cycle 0%
Duty Cycle 50%
Duty Cycle 100%

Start Voltage:


Air Flow – At rated voltage zero static pressure (minimal value):

0.413m³ /z min (14.6CFM)
0.48m³ / min (16.9CFM)
1.55m³ / min (54.6CFM)

Static Pressure – At rated voltage At zero air flow:

0.65mm-H2O (0.026inch-H2O)
0.88mm-H2O (0.035inch-H2O)
9.15mm-H2O (0.36inch-H2O)

Input Current (Max.):


Speed (Max.):

1400RPM ±200 1900RPM ±10% 4500RPM ±10%

Acoustical Noise:


Input Power:


Insulation Resistance – Between Frame and Terminal:

10 M ohm at DC 500 V

Dielectric Strength – Between Frame and Terminal:

5mA (Max.)@ AC 500 V 60 Hz 1 min.

Life – Continuous operating under normal temperature (25 °C or 77 °F):

80,000 hours

Auto restart Time:



Anticlockwise Air Discharged

Lead Wires:

UL 1007, awg 28 or Equivalent“-“: Black; “+”: Red;”s”: White. ”PWM”: Blue

Vibration Test:

Displacement Amplitude: 0.75mm(Equivalent 10G)
Frequency Range:10Hz<->55Hz/30SEC.
Lineear Scanning 120 Cycle
Endurance Timer Per Axis:30Min.

Drop Test:

Motor withstands one free body drop from30 cm in high onto 10 mm thickness ofwooden board for each of the three facesin minimum packing condition.

Acoustic Noise: 15.3/18.7/44dBA – Curve (Max 15.8/19.2/44.5dBA)Measuring Condition – Under rated voltage in semi-anechoic chamber equipmentsound level meter. (Figure A.)

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