DC Brushless Fans (BLDC)

Part Number	Description / PDF	Quantity
19032038A Comair Rotron	FAN AXIAL 119.1X39.1MM MD48B3	42
19031084A Comair Rotron	FAN AXIAL 172X50.8MM 24V PQ24B4	504
19043171A Comair Rotron	FAN IMP 175X68.6MM DD692748Z1E5X	0
19044018A Comair Rotron	FAN AXIAL 172X51MM MFXE48Z1D3	355
19031076A Comair Rotron	FAN AXIAL 127X38.1MM 48V GL48B4	109
19039299A Comair Rotron	FAN AXIAL 172.7X50.8MM PQ24S4HX	25
19030769A Comair Rotron	FAN AXIAL 79.8X41.8MM 48V SD48B5	112
19039693A Comair Rotron	FAN AXIAL 171.4X50.8MM JQD48Z3A2	57
19031104A Comair Rotron	FAN BLOWER 80X32.4MM 24V WT24M3	55
19030572A Comair Rotron	FAN AXIAL 120X32MM 24VDC MC24B3	605
19039692A Comair Rotron	FAN AXIAL 171.4X50.8MM JQD24Z3A2	105
19031767A Comair Rotron	FAN AXIAL 254X88.9MM 48V CD48B3	297
17001171A Comair Rotron	FAN DC IP68 GLD24B3E2X-E3	0
19031083A Comair Rotron	FAN AXIAL 172X50.8MM 12V PQ12B4	125
19039847A Comair Rotron	FAN IMP MTR 175X68MM DD692712B1A	0
19031085A Comair Rotron	FAN AXIAL 172X50.8MM 48V PQ48B4	83
17001201A Comair Rotron	JQD12B3-E3	0
19032196A Comair Rotron	FAN BLOWER 160.7X50.2MM SPD48B1	0
19041196A Comair Rotron	FAN AXIAL 171.5X55MM MT24R0X-E2	163
19031481A Comair Rotron	FAN AXIAL 80X32MM 48VDC ST48K0X	135

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%)