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Bionic Blade Fan

Bionic Blade Fan

Delta bionic blade fans (THD Series) are high performance and extreme low noise dc fans that designed specifically for the following applications: telecom, networking, data center, server, and cloud storage.

With excellent bionic blade and structure design, THD fans represents the most quiet, powerful, efficient design and high performance DC axial fans. By simulating the curve of an osprey’s wing in flight, the new THD series fan reduces fan noise up to 6dB-A. THD fans offer different sizes of products, from SQ60mm to OD225mm.

THD DC fans profile:


The next-generation bionic blade and structure design to assist telecom fan meet higher operating point and low noise and higher efficiency requirement. The THD series fan was inspired while observing a flying osprey. “The oprey’s diving posture when catching prey is swift, quiet, and precise. Their wings work similarly to the principle behind how fans work too.” Engineers manage to apply the posture and wing structures of ospreys to design fan blades via parameterized and simulated processes.

THD fans with bionic design manage to reduce up to 6dB-A of noise compared to its competitors while maintaining highly efficient operations. The measurement of noise is a logarithmic relation, so a reduction of 6dB-A is a 10^6 reduction of noise, which is equivalent to the difference between four fans running simultaneously and the noise from one fan– quite a significant margin.

Once the product was successfully developed, the fan team gradually applied this high-performance heat dissipation fan to many more of Delta’s products. From telecom servers to heat exchangers and air conditioning, home-based ventilators will be introduced next to bring out higher competitiveness for a series of Delta’s fan products.

Four Product Features

  • Multi-section stack design: using virtual simulation analysis and biometric parameters of a bird wing airfoil section

  • High-strength Bionic blades: our new fan blades are stronger and have been tested through simulation and destruction of speed tests

  • Stator blade tip design: lowers noise and wingtip vortex through reduced wingtip connection surface which simulates the floating wingtip of an osprey in flight

  • hDEC Control: advanced motor drive control to improve the fan motor drive efficiency

design concept, biomechanics, high strength blade, hDEC control, advanced blades tip

Enhanced Structure to Achieve Low Vibration

Through vibration simulations and different material bonding strength studies, Delta has enhanced the structural design of the fan's frame to gain higher natural frequency for improved vibration and resonance.

Available Models: (Roll over a DC fan to see a larger image or click on part number to get more details)

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) THD0612VE-00 60x60x38 10.2~13.2 12 VDC 2.90A 34.80W 19500RPM 66.0dB(A) 80.54CFM (2.278m3/min) 4.43inchH2O (112.52mmH2O)
THD0848ME 80x80x38 36.0~75.0 48 VDC 0.55A 26.40W 9500RPM 60.0dB(A) 128.00CFM (3.626 m3/min) 1.476inchH2O (37.50mmH2O) THD0812VE-00 80x80x80 10.8~13.2 12 VDC 15.0A 180.00W 15000RPM 78.5dB(A) 195.68CFM (5.542 m3/min) 7.480inchH2O (190.00mmH2O) THD0848VE-00 80x80x80 36.0~72.0 48 VDC 3.60A 172.80W 15000RPM 78.5dB(A) 195.00CFM (5.522m3/min) 7.280inchH2O (185.00mmH2O)
THD0948HE-A 92x92x38 36.0~75.0 48 VDC 1.10A 52.80W 13500RPM 71.0dB(A) 182.41CFM (5.167 m3/min) 3.44inchH2O
THD1248HE 120x120x38 32~59 48 VDC 2.20A 105.82W 10900RPM 75.0dB(A) 287.00CFM (8.122 m3/min) 4.40inchH2O (111.764mmH2O)
THD1348HE 134x134x38 36.0~60.0 48 VDC 5.00A 240.00W 12500RPM 82.0dB(A) 490.00CFM (13.870 m3/min) 7.10inchH2O (180.34mmH2O)
THD2048HT 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) THD2348MU-00 Round-225mm diameter x 100mm Width 36.0~60.0 48 VDC 3.75A 180.00W 5000RPM 70.0dB(A) 915.00CFM (25.909 m3/min) 2.291inchH2O (58.20mmH2O)
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)

The performance data is subject to change without notice.