DC Brushless Fans (BLDC)

Part Number	Description / PDF	Quantity
9GA1224G4001 Sanyo Denki	FAN AXIAL 120X25.4MM 24VDC WIRE	137
9GV0948P1F031 Sanyo Denki	DC AXIAL FAN 92X92X38MM PWM	0
9CRD0412P5G03 Sanyo Denki	FAN 40X56MM 12VDC TACH,PWM	42
9HV0412P3K001 Sanyo Denki	FAN 40X28MM 12VDC RBLS TACH,PWM	0
9A0824G402 Sanyo Denki	FAN 80X25MM 24VDC	107
9GA0612P1J03 Sanyo Denki	FAN 60X38MM 12VDC TACH,PWM	242
9GAX0412P3S003 Sanyo Denki	FAN 40X28MM 12VDC LOW VIB	95
9WS0912H401 Sanyo Denki	FAN 92X25MM 12VDC IP54 TACH	0
9TGA24P0H001 Sanyo Denki	CENTRIFUGAL FAN 24VDC 175x69MM	11
9W1BM12P2H001 Sanyo Denki	12VDC SPLASH PROOF BLOWER IP68	7
9CR0612P5H03 Sanyo Denki	FAN 60X51MM 12VDC TACH,PWM	54
9LG1448M1002 Sanyo Denki	FAN 140X140X38MM 48VDC	10
109P0424H301 Sanyo Denki	FAN 40X28MM 24VDC TACH	314
109R0605H402 Sanyo Denki	FAN 60X25MM 5VDC	128
9GA0612P7G01 Sanyo Denki	FAN 60X15MM 12VDC TACH,PWM	1236
9WFA0924H4001 Sanyo Denki	92X25MM, DC 24V, OIL PROOF, HIGH	26
9BMB12P2G01 Sanyo Denki	BLOWER 97X33MM 12VDCTACH,PWM	108
9GV3612G301 Sanyo Denki	FAN 36X28MM 12VDC VANE TACH	79
109P0405F3013 Sanyo Denki	FAN 40X28MM 5VDC TACH	0
9GA0924M4021 Sanyo Denki	FAN 92X92X25MM 24VDC	59

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%)