Description
Coolcox BF4020H24S is a 40 x 40 x 20 mm centrifugal blower fan operating at 24 VDC with a nominal speed of 8 000 RPM. The unit features a PBT plastic housing and impeller rated to UL 94V-0 standards, integrated with a high-precision sleeve bearing system. It utilizes a brushless DC motor design providing 3.8 CFM of airflow and 12.8 mmH2O static pressure. The electrical interface consists of two UL 2468 AWG 26 lead wires, drawing a rated current of 0.10 A and power consumption of 2.4 W.
BF4020H24S Specifications
Model: BF4020H24S
Brand: Coolcox
Category: DC Blower Fan
Dimensions: 40 x 40 x 20 mm
Rated Voltage: 24 VDC
Operating Voltage Range: 14.0 to 27.6 VDC
Rated Current: 0.10 A
Input Power: 2.4 W
Rated Speed: 8 000 RPM
Maximum Airflow: 3.8 CFM
Static Pressure: 12.8 mmH2O
Noise Level: 38.0 dBA
Bearing Type: Sleeve Bearing
Frame Material: Thermoplastic PBT (UL 94V-0)
Impeller Material: Thermoplastic PBT (UL 94V-0)
Lead Wire: UL 2468 AWG #26
Connector: 2-pin (stripped/tinned)
Operating Temperature: -10 to +70 °C
Storage Temperature: -40 to +75 °C
Insulation Resistance: 10 M Ohm at 500 VDC
Dielectric Strength: 5 mA Max at 500 VAC for 1 minute
Life Expectancy: 30 000 hours at 25 °C
Weight: 17 g
BF4020H24S Applications
Primary applications include integration into 3D printer hotend cooling assemblies, compact medical respiratory equipment, and telecommunication server rack ventilation modules. Deployed within automotive seat climate control systems and industrial laser power supply thermal management units.





Additional information
| Shipping Weight | 1 kg |
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