DC Brushless Fans (BLDC)

Part Number	Description / PDF	Quantity
19032875A Comair Rotron	FAN AXL 175.5X107.2MM TD24B7	0
19040808A Comair Rotron	FAN IMP MTR 227X65MM DDE892824B	1
17001172A Comair Rotron	FAN DC IP68 GLD48B3E2X-E3	17
19030621A Comair Rotron	FAN BLOWER 120.7X31MM 24V BD24B3	150
19031573A Comair Rotron	FAN AXIAL 254X88.9MM 24V CD24B3	231
19040433A Comair Rotron	FAN AXIAL 120X32MM 24V MC24B3NDN	47
19044008A Comair Rotron	FAN AXIAL 200.7X69.9MM MFSE24Z	110
17001140A Comair Rotron	FAN DC IP68 SDD48B1E2X-E3	0
19030615A Comair Rotron	FAN AXIAL 80X32MM 12VDC ST12B3	232
17001209A Comair Rotron	GLD48B3-E3	0
19030614A Comair Rotron	FAN AXIAL 80X32MM 24VDC ST24K3	187
19032525A Comair Rotron	FAN AXIAL 120X38.1MM 12V MS12B3	333
19031092A Comair Rotron	FAN AXIAL 171.5X50.8MM JQ12C4	47
19028868A Comair Rotron	FAN AXIAL 119.1X39.1MM MD12B2	86
19039822A Comair Rotron	FAN IMP MTR 102X55MM DD402148B1R	50
19031841A Comair Rotron	FAN AXIAL 171.5X55MM 48V MT48B3	0
17001174A Comair Rotron	FAN DC IP68 GLD24K3E2X-E3	0
19039858A Comair Rotron	FAN IMP MTR 192X69MM DD752748B1A	69
19031102A Comair Rotron	FAN BLOWER 80X32.4MM 24V WT24B3	230
19032396A Comair Rotron	FAN AXIAL 80X32MM 12VDC ST12T3H	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%)