DC Brushless Fans (BLDC)

Part Number	Description / PDF	Quantity
16003387A Comair Rotron	FAN BLWR 80X32.4MM 24V WT24Z7-E2	856
19030599A Comair Rotron	FAN AXIAL 120X32MM 24VDC MC24B7	132
19031074A Comair Rotron	FAN AXIAL 127X38.1MM 12V GL12B4	106
19041119A Comair Rotron	FAN AXIAL 171.4X50MM JQ48B7X-E2	616
19030829A Comair Rotron	FAN AXIAL 80X32MM BALL 5V ST05B3	0
19028933A Comair Rotron	FAN AXIAL 79.8X41.8MM 12V SD12B1	180
17000302A Comair Rotron	FAN BLOWER 50.8MM SPDD24K1 24VDC	0
19031200A Comair Rotron	FAN AXIAL 127X38.1MM 12V GL12B7	45
19032003A Comair Rotron	FAN AXIAL 79.8X41.8MM 48V SD48B2	93
19044009A Comair Rotron	FAN AXIAL 200.7X69.9MM MFSE48Z	46
19031075A Comair Rotron	FAN AXIAL 127X38.1MM 24V GL24B4	350
19032105A Comair Rotron	FAN AXIAL 119.1X39.1MM MD28B5	195
19041286A Comair Rotron	FAN AXIAL 172X50.8MM JQD48Z6E6X	41
19032364A Comair Rotron	FAN BLWR 160.7X50.2MM SPD24B1QDN	86
19031263A Comair Rotron	FAN AXIAL 172X50.8MM 24V PQ24B7	208
19032002A Comair Rotron	FAN AXIAL 79.8X41.8MM 24V SD24B2	95
19032001A Comair Rotron	FAN AXIAL 79.8X41.8MM 12V SD12B2	250
17001166A Comair Rotron	FAN DC IP68 MDD24K1E2X-E3	0
17001144A Comair Rotron	FAN DC IP68 SDD12Z1E2X-E3	0
19031328A Comair Rotron	FAN AXIAL 171.5X50.8MM JQ48B7	194

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%)