Pulse Width Modulated (PWM) DC Fans - Low Noise, High CFM - DC Fans From JMC Products


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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.