DC Brushless Fans (BLDC)

Part Number	Description / PDF	Quantity
9HV0924P4H0011 Sanyo Denki	92X25MM, DC, 24V, HIGH STATIC PR	0
9WFA0424G6002 Sanyo Denki	40X20MM, DC 24V, OIL PROOF, HIGH	0
9G1212H102 Sanyo Denki	FAN 120X38MM 12VDC	180
9CRA0612P6K001 Sanyo Denki	FAN 60X56MM 12VDC TACH,PWM	143
9G0912H1D011 Sanyo Denki	FAN 92X38MM 12VDC RBLS LOCK	58
9LG1412P1M001 Sanyo Denki	FAN 12VDC 140X38MM TACH/PWM	2
9G0624P4H001 Sanyo Denki	FAN 60X25MM 24VDC TACH,PWM	0
9CRB0412P5K001 Sanyo Denki	FAN 40X56MM 12VDC TACH,PWM	171
9BMB12P2F01 Sanyo Denki	BLOWER 97X33MM 12VDCTACH,PWM	0
9WP0612H401 Sanyo Denki	FAN 60X25MM 12VDC IP68 TACH	214
9TJ48P0H01 Sanyo Denki	FAN 133X91MM 48VDC CENT PULSEPWM	0
9WFA0624G6001 Sanyo Denki	60X20MM, DC 24V, OIL PROOF, HIGH	100
9A0912S4011 Sanyo Denki	FAN 92X25MM 12VDC RBLS TACH	0
9GA0948P1H03 Sanyo Denki	FAN 92X38MM 48VDC TACH,PWM	527
9A0924S401 Sanyo Denki	FAN 92X25MM 24VDC TACH	318
9GA0824P4J013 Sanyo Denki	FAN 24V 80X25MM TACH/PWM W/CONN	0
9GA0912P4J03 Sanyo Denki	FAN 92X25MM 12VDC TACH,PWM	448
9G1224E1011 Sanyo Denki	FAN 120X38MM 24VDC RBLS TACH	0
9GA0812P6G001 Sanyo Denki	FAN 80X20MM 12VDC TACH,PWM	502
109P0412H302 Sanyo Denki	FAN 40X28MM 12VDC	233

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%)