Pulse-Width Modulation - PWM
PWM (Pulse-width modulation) regulates the voltage signal between fully on and fully off, controlling the speed of a fan. The PWM function is commonly used in OEM cases. Delta also provides standard PWM through distribution channels. Delta's internal PWM signal control fans deliver a variety of advantages over external PWM controlled devices:
- Wide PWM Frequency Range Input (30Hz- 30kHz)
- Lower vibration at lower duty cycle
- Prevent spike current on fan speed control
- Better motor efficiency
- Lower fan switching noise

Part number (Download spec sheets) | Dimension (mm) | Operating Voltage Range (VDC) | Voltage (VDC) | Current (A) | Power (W) | Speed (RPM) | Noise (dB-A) | Air Flow (CFM) | Air Pressure (in H2O) |
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200x200x70 | 36.0~75.0 | 48 VDC | 8.00A | 384.00W | 7400RPM | 78.0dB(A) | 1026.80CFM (29.06 m3/min) | 4.945inchH2O (125.61mmH2O) |
PFB1248UHE-EP | 120x120x38 | 30.0~60.0 | 48 VDC | 0.88A | 42.24W | 5300RPM | 66.0dB(A) | 243.66CFM (6.900 m3/min) | 1.311inchH2O (33.315mmH2O) |
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N/A | N/A | 48 VDC | 1.10A | 52.80W | 5500RPM | 66.5dB(A) | 252.85CFM (7.16 m3/min) | 1.412inchH2O (35.877mmH2O) |
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N/A | N/A | 12 VDC | 1.45A | 17.40W | 4000RPM | 56.4dB(A) | 150.33CFM (4.257 m3/min) | 0.489inchH2O (12.43mmH2O) |
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N/A | N/A | 12 VDC | 0.55A | 6.60W | 16000RPM | 58.5dB(A) | 20.23CFM (0.573 m3/min) | 1.463inchH2O (37.15mmH2O) |
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N/A | N/A | 12 VDC | 0.39A | 4.68W | 14500RPM | 50.0dB(A) | 16.30CFM (0.461 m3/min) | 1.000inchH2O (25.40mmH2O) |
EFC1748DG-TYSG | 172x172x51 | 28.0~53.0 | 48 VDC | 1.23A | 59.04W | 5500RPM | 63.4dB(A) | 415.66CFM (11.770 m3/min) | 1.771inchH2O (44.99mmH2O) |
EFC1748DG-TP07 | N/A | N/A | 48 VDC | 1.23A | 59.04W | 5500RPM | 63.4dB(A) | 415.66CFM (11.770 m3/min) | 1.771inchH2O (44.99mmH2O) |
EFB1548VHG-TP14 | 172x150x51 | 36.0~60.0 | 48 VDC | 0.49A | 23.52W | 4000RPM | 60.0dB(A) | 302.29CFM (8.560 m3/min) | 0.937nchH2O (23.80mmH2O) |
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N/A | N/A | 12 VDC | 0.69A | 8.28W | 3200RPM | 53.5dB(A) | 28.33CFM (0.802 m3/min) | 0.947nchH2O (24.05mmH2O) |
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N/A | N/A | 12 VDC | 0.12A | 1.44W | 5100RPM | 32.5dB(A) | 3.53CFM (0.100 m3/min) | 0.563inchH2O (14.31mmH2O) |
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N/A | N/A | 12 VDC | 2.30A | 27.60W | 10800RPM | 69.3dB(A) | 30.16CFM (0.854 m3/min) | 3.675inchH2O (93.35mmH2O) |
AUB1212H-CK15 | 120x120x25 | 10.8~13.2 | 12 VDC | 0.27A | 3.24W | 2200RPM | 38.0dB(A) | 88.60CFM (2.51 m3/min) | 0.161inchH2O (04.08mmH2O) |
AFC1212D-SP19 | N/A | N/A | 12 VDC | 0.32A | 3.84W | 3000RPM | 46.0dB(A) | 89.70CFM (2.540 m3/min) | 0.338inchH2O (8.591mmH2O) |
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N/A | N/A | 48 VDC | 0.31A | 14.88W | 4100RPM | 55.5dB(A) | 190.48CFM (5.394 m3/min) | 0.694inchH2O (17.635mmH2O) |
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120x120x38 | 34.0~56.0 | 48 VDC | 0.31A | 14.88W | 4100RPM | 55.5dB(A) | 190.48CFM (5.394 m3/min) | 0.694inchH2O (17.635mmH2O) |
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N/A | N/A | 24 VDC | 1.30A | 31.20W | 5200RPM | 62.0dB(A) | 240.96CFM (6.823 m3/min) | 1.082inchH2O (27.483mmH2O) |
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N/A | N/A | 48 VDC | 1.60A | 76.80W | 7000RPM | 72.5dB(A) | 306.92CFM (8.691 m3/min) | 2.175inchH2O (55.235mmH2O) |
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N/A | N/A | 12 VDC | 4.00A | N/A | 5500RPM | 66.5dB(A) | 252.85CFM (7.16 m3/min) | 1.412inchH2O (35.877mmH2O) |
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N/A | N/A | 48 VDC | 1.00A | N/A | 5500RPM | 66.5dB(A) | 252.85CFM (7.160 m3/min) | 1.412inchH2O (35.877mmH2O) |
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120x120x38 | 32~59 | 48 VDC | 2.20A | 105.82W | 10900RPM | 75.0dB(A) | 287.00CFM (8.122 m3/min) | 4.400nchH2O (111.764mmH2O) |
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92x92x38 | N/A | 48 VDC | 1.10A | 52.80W | 13500RPM | 71.0dB(A) | 182.41CFM (5.167 m3/min) | 3.435nchH2O (87.24mmH2O) |
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92x92x38 | 36.0~75.0 | 48 VDC | 1.10A | 52.80W | 13500RPM | 71.0dB(A) | 182.41CFM (5.167 m3/min) | 3.44inchH2O |
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N/A | N/A | 48 VDC | 4.20A | 201.60W | 7700RPM | 78.0dB(A) | 690.30CFM (19.583 m3/min) | 4.141inchH2O (105.18mmH2O) |
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N/A | N/A | 48 VDC | 4.80A | 230.40W | 5800RPM | 73.6dB(A) | 827.37CFM (23.410 m3/min) | 2.690inchH2O (68.50mmH2O) |
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N/A | N/A | 48 VDC | 3.50A | 168.00W | 8000RPM | 75.0dB(A) | 607.07CFM (17.170 m3/min) | 4.136inchH2O (105.5mmH2O) |
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N/A | N/A | 48 VDC | 1.57A | 75.36W | 5800RPM | 70.0dB(A) | 410.51CFM (11.624 m3/min) | 2.085inchH2O (52.97mmH2O) |
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N/A | N/A | 48 VDC | 1.10A | 52.80W | 6100RPM | 66.8dB(A) | 325.90CFM (9.230 m3/min) | 1.65nchH2O (41.85mmH2O) |
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N/A | N/A | 48 VDC | 0.95A | 45.60W | 7800RPM | 70.0dB(A) | 262.00CFM (7.360 m3/min) | 2.025inchH2O (51.44mmH2O) |
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N/A | N/A | 12 VDC | 1.60A | 19.20W | 5300RPM | 59.0dB(A) | 184.20CFM (5.218 m3/min) | 0.899inchH2O (22.83mmH2O) |
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175x175x69 | 36.0~60.0 | 48 VDC | 1.60A | 76.80W | 4000RPM | 70.8dB(A) | 428.00CFM (12.125 m3/min) | 1.96inchH2O (49.78mmH2O) |
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N/A | N/A | 24 VDC | 0.91A | 21.84W | 6000RPM | 64.0dB(A) | 195.68CFM (5.542 m3/min) | 1.028inchH2O (26.105mmH2O) |
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N/A | N/A | 12 VDC | 1.80A | 21.60W | 6000RPM | 64.0dB(A) | 210.38CFM (5.957 m3/min) | 1.170inchH2O (29.179mmH2O) |
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120x120x38mm | 8.0 - 13.2 VDC | 12 VDC | 2.70A | 32.40W | 6600RPM | 65.5dB(A) | 228.65CFM (6.475 m3/min) | 1.206inchH2O (30.636mmH2O) |
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N/A | N/A | 12 VDC | 3.70A | 44.40W | 7400RPM | 68.5dB(A) | 254.34CFM (7.202 m3/min) | 1.438inchH2O (36.513mmH2O) |
PFM1412DEB7V | 140x140x38 | N/A | 12 VDC | 3.90A | 46.80W | 6500RPM | 70.0dB(A) | 282.31CFM (7.994 m3/min) | 2.033inchH2O (51.65mmH2O) |
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N/A | N/A | 12 VDC | 0.40A | 4.80W | 2900RPM | 44.0dB(A) | 120.07CFM (3.400 m3/min) | 0.354inchH2O (09.00mmH2O) |
Part number (Download spec sheets) | Dimension (mm) | Operating Voltage Range (VDC) | Voltage (VDC) | Current (A) | Power (W) | Speed (RPM) | Noise (dB-A) | Air Flow (CFM) | Air Pressure (in H2O) |
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Contact local distributors for standard PWM fan offerings.