DC Brushless Fans (BLDC)

Part Number	Description / PDF	Quantity
9GA1212P4S001 Sanyo Denki	FAN AXIAL 120X25.4MM 12VDC WIRE	0
109R0805F402 Sanyo Denki	FAN 80X25MM 5VDC	316
9LG1424P5G001 Sanyo Denki	FAN 24VDC 140X51MM TACH/PWM	1
9HV0948P1G001 Sanyo Denki	FAN 92X38MM 48VDC VANE TACH,PWM	0
9G0924S201 Sanyo Denki	FAN 92X32MM 24VDC TACH	149
9GV0412P3J03 Sanyo Denki	FAN 40X28MM 12VDC VANE TACH,PWM	238
9W2TS48P0S001 Sanyo Denki	FAN IMP MTRZD 225X99MM 48VDC	8
9GAX0412P3K001 Sanyo Denki	FAN 40X28MM 12VDC LOW VIB	118
9WP0924F401 Sanyo Denki	FAN 92X25MM 24VDC IP68 TACH	0
9BMB12F201 Sanyo Denki	BLOWER 97X33MM 12VDCTACH	68
9SG1212P1G01 Sanyo Denki	FAN 120X38MM 12VDC RBLS TACH,PWM	0
9G0948S2011 Sanyo Denki	FAN 92X32MM 48VDC RBLS TACH	50
9GA0924F4D011 Sanyo Denki	FAN 92X92X25MM 24VDC	58
9TP48P0G001 Sanyo Denki	FAN 221X71MM 48VDC CENT TACH,PWM	5
9G0624S101 Sanyo Denki	FAN 60X38MM 24VDC TACH	323
9G1224H1D01 Sanyo Denki	FAN 120X38MM 24VDC LOCK	148
9LG1412P5S001 Sanyo Denki	FAN 12VDC 140X51MM TACH/PWM	12
109P0612H701 Sanyo Denki	FAN 60X15MM 12VDC TACH	143
109P0612S7D01 Sanyo Denki	FAN 60X15MM 12VDC LOCK	0
9W1BM24P2M001 Sanyo Denki	24VDC SPLASH PROOF BLOWER IP68	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%)