DC Brushless Fans (BLDC)

Part Number	Description / PDF	Quantity
EYW12038024BS-12 YS Tech USA	E-SERIES FAN EXTRA HIGH W/PWM	19
OD1238-48MBXC5 Orion Fans	FAN AXIAL 120X38.5MM 48VDC WIRE	0
4710KL-05W-B10-E00 NMB Technologies Corp.	FAN AXIAL 119X25.5MM 24VDC WIRE	1278
G1238M24B1-FSR Mechatronics	FAN AXIAL 120X38MM TACH 24VDC	0
CFM-7020V-143-400-11 CUI Devices	FAN AXIAL 70X20MM 12VDC WIRE	0
CFM-8020V-133-380 CUI Devices	FAN AXIAL 80X20MM 12VDC WIRE	419
FAD1-09225DSLW11 Qualtek Electronics Corp.	FAN AXIAL 92.5X25MM 24VDC WIRE	0
FAD1-12032DHHW12 Qualtek Electronics Corp.	FAN AXIAL 120X32.3MM 24VDC WIRE	0
19039696A Comair Rotron	FAN AXIAL 171.4X50.8MM PQD48Z3A2	128
2410ML-05W-B19-B00 NMB Technologies Corp.	FAN AXIAL 60X25MM 24VDC WIRE	0
FFB1248VHE-F00 Delta Electronics / Fans	FAN AXIAL 120X38MM 48VDC WIRE	0
F250A5-072-D0520 NMB Technologies Corp.	FAN IMP MTRZD 250X99.8MM 24VDC	4
612NGH ebm-papst Inc.	FAN AXIAL 60X25MM 12VDC	717
9GA0612H9001 Sanyo Denki	FAN 60X10MM 12VDC TACH	244
AFB1212VHE-R00 Delta Electronics / Fans	FAN AXIAL 120X38MM 12VDC WIRE	15
9GA0924P4J031 Sanyo Denki	FAN 92X25MM 24VDC RBLS TACH,PWM	0
4414/2N-522 ebm-papst Inc.	FAN 24VDC 119X38MM TACH	64
FDD1-17251EBAW3B-L56 Qualtek Electronics Corp.	FAN AXIAL 172X51MM 48VDC WIRE	0
OD6025-12LBIP55 Orion Fans	FAN AXIAL 60X25MM 12VDC WIRE	0
CFM-4010V-170-273 CUI Devices	FAN AXIAL 40X10MM 12VDC 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%)