DC Brushless Fans (BLDC)

Part Number	Description / PDF	Quantity
9A0924G401 Sanyo Denki	FAN 92X25MM 24VDC TACH	72
9A0612F4011 Sanyo Denki	FAN 60X25MM 12VDC RBLS TACH	17
9LG1412H5002 Sanyo Denki	FAN 140X140X51MM 12VDC	12
9RF0912P1H001 Sanyo Denki	FAN 12VDC REVERSIBLE 92X38MM	160
109P0424G302 Sanyo Denki	FAN 40X28MM 24VDC	0
9BMB24G201 Sanyo Denki	BLOWER 97X33MM 24VDCTACH	0
9GV0948H101 Sanyo Denki	DC AXIAL FAN 92X92X38MM TACH	0
9G1224G4D011 Sanyo Denki	FAN 120X25MM 24VDC RBLS LOCK	549
9G0824G102 Sanyo Denki	FAN 80X38MM 24VDC	0
9LG1412L1001 Sanyo Denki	FAN 140X140X38MM 12VDC	6
9A0812G401 Sanyo Denki	FAN 80X25MM 12VDC TACH	601
9GL1224H101 Sanyo Denki	FAN 120X38MM 24VDC RBLS TACH	0
9G0912S2D011 Sanyo Denki	DC AXIAL FAN 92X92X32MM LOCK	0
109P0424H701 Sanyo Denki	FAN 40X15MM 24VDC TACH	262
9A0912S4021 Sanyo Denki	FAN 92X25MM 12VDC RBLS	0
109P0412H902 Sanyo Denki	FAN 40X10MM 12VDC	189
9WV1248P1J001 Sanyo Denki	FAN 120X38MM 48VDC IP68 RBLS	315
9WF0424F6D01 Sanyo Denki	FAN 40X20MM 24VDC OIL PROOF LOCK	72
109R0624D4D01 Sanyo Denki	FAN 60X25MM 24VDC LOCK	0
9TS48P0G001 Sanyo Denki	FAN 225X99MM 48VDC CENT TACH,PWM	12

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%)