Chile

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Fan size: 40*40*27.9MM
Wire length: 300MM
Red line: DC12V positive
Black wire: DC12V negative
Blue wire: PWM (above 500HZ), the negative pole of PWM should be connected to the black wire in parallel
Yellow line: It is estimated that it is a feedback signal line, which is left unconnected.
There are two wiring methods for this fan:

1. Connect the positive pole of the power supply to the red wire and the negative pole to the black wire, and the fan will operate normally. At this time, adjusting the voltage can also adjust the fan speed.
2. The positive pole of the power supply is connected to the red wire, the negative pole is connected to the black wire, the blue wire is connected to the PWM (pulse above 500HZ), and the negative pole of the PWM is also connected to the black wire. Adjusting the duty cycle in this way is a high speed. (20%-99%)

The following measured fan speed at different duty cycles:
Label (DC12V0.17A) 
measured current 0.156 A
       Duty cycle 20% 2485 RPM

       Duty cycle 40% 4100 RPM

       Duty cycle 60% 5890 RPM

       Duty cycle 80% 7865 RPM

       Duty cycle 90% 8900 RPM

       Duty cycle 99% 9970 RPM
Package Include:1PCS * fan