DC Brushless Fans (BLDC)

Part Number	Description / PDF	Quantity
EE60251B1-000U-999 Sunon	FAN 60X25MM 12VDC 23.5 CFM	4059
F6025X12B1+3-RS Mechatronics	FAN AXIAL 60X25MM 12VDC WIRE	0
9A0912H401 Sanyo Denki	FAN 92X25MM 12VDC TACH	93
CFM-6020V-245-335-11 CUI Devices	FAN AXIAL 60X20MM 24VDC WIRE	0
MF40202V2-1000U-A99 Sunon	40X40X20 24VDC VAPO 7.7CFM	1831
BFB0712L-A Delta Electronics / Fans	75X75X25MM 12V DC BLOWER	269
MS2507H12B2-RSR Mechatronics	FAN AXIAL 25X7.4MM BALL 12VDC	0
E9225E12B1-FSR Mechatronics	FAN AXIAL 92X25MM 12VDC TACH	10
FAD1-04010DHMW11 Qualtek Electronics Corp.	FAN AXIAL 40X10MM 24VDC WIRE	0
DV6224TD ebm-papst Inc.	FAN AXIAL 171.5X50.8MM 24VDC	0
F250A6-072-D0420 NMB Technologies Corp.	FAN IMPELLER	0
CFM-5015V-132-154-20 CUI Devices	FAN AXIAL 50X15MM 12VDC WIRE	192
DC0382812V2B-3T0 Wakefield-Vette	FAN 12VDC 38X28MM 3WIRES	0
MR1238L24B1-FSR Mechatronics	FAN AXIAL 120X38MM 24VDC WIRE	0
1608VL-04W-B59-B00 NMB Technologies Corp.	FAN AXIAL 40.1X20MM 12VDC WIRE	362
GFC0612DS-AQ14 Delta Electronics / Fans	FAN AXIAL DUAL 60X56MM 12VDC	0
512F ebm-papst Inc.	FAN AXIAL 50X15MM 12VDC WIRE	79
109P0424H6D01 Sanyo Denki	FAN 40X20MM 24VDC LOCK	625
FDD1-17251DBHW39-L Qualtek Electronics Corp.	FAN AXIAL 172X51MM 24VDC WIRE	0
OD9225-24HHS Orion Fans	FAN AXIAL 92.5X25MM 24VDC WIRE	0

DC Brushless Fans (BLDC)

1. Overview

DC Brushless Fans (BLDC) are electronically commutated fans that use permanent magnet rotors and stationary coil stators. Unlike traditional brushed DC fans, BLDC fans eliminate mechanical brushes, reducing wear and tear while improving efficiency. They play a critical role in modern thermal management systems, ensuring reliable cooling for electronics in computers, industrial equipment, automotive systems, and consumer devices. Their advantages include high energy efficiency (up to 90%+), low noise levels (20-50 dB(A)), and extended operational lifespans (>50,000 hours).

2. Main Types and Functional Classification

Type	Functionality Features	Application Examples
40-60mm Mini Fans	Compact design, low power (2-5W), PWM control	Mini PCs, Network routers
80-120mm Standard Fans	High airflow (50-200 CFM), balanced noise-performance	Servers, Power supplies
High-Static Pressure Fans	Optimized blade design (30-60 Pa pressure), dust resistance	Telecom cabinets, Industrial HVAC
Low-Noise Fans	Aerodynamic blades, hydro bearing ( 25 dB(A))	Home appliances, Medical equipment
Smart Fans	Integrated sensors, IoT connectivity, variable speed	Data centers, EV battery cooling

3. Structure and Components

A typical BLDC fan comprises:

Stator Assembly: Laminated steel core with three-phase windings
Permanent Magnet Rotor: Rare-earth magnets (NdFeB) for high torque
Control Circuit: Hall-effect sensors + MOSFET driver IC for electronic commutation
Bearing System: Ball bearings (70,000 hours L10) or sleeve bearings
Housing: UL94 V-0 rated plastic or aluminum alloy

4. Key Technical Specifications

Parameter	Typical Range	Importance
Voltage	5V to 48V DC	System compatibility
Current	0.1A to 5A	Power consumption
Speed	600-10,000 RPM	Determines airflow
Airflow	10-500 CFM	Cooling capacity
Noise	15-55 dB(A)	User experience
MTBF	50,000-100,000 hours	Reliability indicator

5. Application Areas

Major industries include:

IT & Telecommunications: Server racks, 5G base stations
Industrial Automation: CNC machines, PLC cabinets
Automotive: EV battery cooling, Powertrain systems
Consumer Electronics: Gaming PCs, Smart TVs
Renewable Energy: Solar inverters, Wind turbine controllers

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
Nidec	UltraFlo 48V Series	85% efficiency, 48V/2A, 120mm
Delta Electronics	AFB1212SHH	PWM control, 200 CFM, 25 dB(A)
Sunon	MGM2201V1-000U-A	Hydro bearing, 60,000 hours
Minebea	25GA048B12H	Smart fan with temperature sensor
Mitsubishi Electric	CA040B12H	IP55 rating, 40mm industrial fan

7. Selection Guidelines

Key considerations:

Match voltage with system power supply
Calculate required airflow using Q=1.76 (P/ T) formula
Select bearing type based on operating environment
Verify acoustic compliance (ISO 13347-1 standard)
Assess control interface (PWM vs. analog voltage)
Evaluate environmental ratings (IP, EMC, RoHS)

8. Industry Trends

Future developments include:

Integration with IoT sensors for predictive maintenance
Adoption of 48V systems in data centers for energy efficiency
Development of ultra-thin fans ( 10mm) for mobile devices
Use of AI algorithms for dynamic speed optimization
Advancements in fluid-dynamic bearings for noise reduction
Growth in automotive applications (EV battery cooling market CAGR: 18.7%)