PWM Fans

Pulse Width Modulated DC Fans

JMC offers a host of high frequency Pulse Width Modulated (PWM) fans that perform at low noise levels by eliminating the power switching noise of the fan. The motor commutation noise is eliminated with high frequency PWM as the coils of the fan are being switched with a frequency above 20 kHz, which is outside the human audible range.

The speed of the fan is controlled by an external PWM signal. The JMC PWM ramps up linearly from a 20% duty cycle up to the fan's maximum rated speed. Because the fan can run at lower speeds it is more energy efficient and will therefore have a longer life.

Several of the listed PWM Fan are also available in 24 and 48 Volts

Data table reflects HIGH speed PWM Fans









MODEL
(number)
VOLTAGE
(Vdc)
POWER
(W)
CURRENT
(A)
SPEED
(RPM)
NOISE
(dBA)
PRESSURE
(in. H20)
AIR FLOW
(CFM)
3828-12
9.0-13.2
6.0
0.50
14000
49.0
0.80
16.0
4025-12
10.8-13.2
2.4
0.20
10000
40.6
0.48
11.0
4028-12
10.8-13.2
13.20
1.10
20000
53.6
1.23
24.0
4028-12 FV
10.8-12.6
20.4
1.70
20000
66.0
2.20
33.0

404056-12

10.8-12.6

37.2

3.10

20000

68.0

2.70

40.0

405032-12

4.5-13.2

5.04

0.42

10200

41.5

0.63

18.5

405038-12

4.5-13.2

9.00

0.75

10200

56.0

0.66

22.5

5015-12

10.8-13.8

1.92

0.16

5500

29.6

0.20

15.8

6015-12

10.8-13.8

3.60

0.30

5000

37.9

0.27

25.0

6025-12

10.8-13.8

7.80

0.65

7000

43.8

0.47

36.8

7015-12

10.8-13.8

7.20

0.60

5200

45.0

0.22

38.0

7025-12

10.8-13.8

4.80

0.40

5000

42.8

0.35

42.7

8015-12

10.8-13.8

2.04

0.17

3200

35.0

0.10

34.5

8020-12

10.8-13.8

3.24

0.27

4500

41.8

0.27

50.5

8025-12

10.8-13.8

7.80

0.65

5000

47.1

0.35

51.4

8038FV-12

10.8-13.2

26.40

2.20

8000

64.5

1.14

115.0

9025-12

10.8-13.8

7.68

0.64

4000

45.0

0.27

82.0

9232-12

10.8-13.8

10.20

0.85

4000

45.0

0.34

83.1

9238-12

10.8-13.8

27.6

2.3

4000

53.2

0.80

124.0

1225-12

10.8-13.8

6.60

0.55

2700

45.0

0.21

105.0

1238-12

10.8-13.8

16.80

1.40

4150

53.0

0.42

150.7

1238FV-12

10.8-13.2

30.0

2.5

4500

60.3

0.82

200.0

Click on the Model Number above to view or download a detailed specification drawing. The files are in Adobe Acrobat PDF format, if you do not have an Adobe Acrobat Reader a free plug-in may be downloaded from Adobe. All links will open in a new window.