DC Brushless Fans (BLDC)

Part Number	Description / PDF	Quantity
FDD1-17251DBAW34-L56 Qualtek Electronics Corp.	FAN AXIAL 172X51MM 24VDC WIRE	0
FAD1-12025EHHW12 Qualtek Electronics Corp.	FAN AXIAL 120X25.5MM 48VDC WIRE	0
FAD1-04010DBMW11 Qualtek Electronics Corp.	FAN AXIAL 40X10MM 24VDC WIRE	0
FAD1-08015CHHW12 Qualtek Electronics Corp.	FAN AXIAL 80X15MM 12VDC WIRE	0
FDD1-17251EBKW3B Qualtek Electronics Corp.	FAN AXIAL 172X51MM 48VDC WIRE	0
FAD1-12038CSAW32 Qualtek Electronics Corp.	FAN AXIAL 120X38.5MM 12VDC WIRE	0
FDD1-17251EBAW33-L56 Qualtek Electronics Corp.	FAN AXIAL 172X51MM 48VDC WIRE	0
FDD1-17251DBJW33 Qualtek Electronics Corp.	FAN AXIAL 172X51MM 24VDC WIRE	0
FDD1-17238CBAW49-L Qualtek Electronics Corp.	FAN AXIAL 172X38.5MM 12VDC WIRE	0
FAD1-12032DSAW12 Qualtek Electronics Corp.	FAN AXIAL 120X32.3MM 24VDC WIRE	0
FDD1-17251EBJW32-56 Qualtek Electronics Corp.	FAN AXIAL 172X51MM 48VDC WIRE	0
FAD1-12038CHHW32 Qualtek Electronics Corp.	FAN AXIAL 120X38.5MM 12VDC WIRE	0
FDD1-17238DBLW4B-L Qualtek Electronics Corp.	FAN AXIAL 172X38.5MM 24VDC WIRE	0
FDD1-17251DBLW3B-56 Qualtek Electronics Corp.	FAN AXIAL 172X51MM 24VDC WIRE	0
FAD1-06020DHMW11 Qualtek Electronics Corp.	FAN AXIAL 60X20MM 24VDC WIRE	0
FAD1-09225CSMW12 Qualtek Electronics Corp.	FAN AXIAL 92.5X25MM 12VDC WIRE	0
FDD1-17251DBAW3B Qualtek Electronics Corp.	FAN AXIAL 172X51MM 24VDC WIRE	0
FAD1-08025CBMW11 Qualtek Electronics Corp.	FAN AXIAL 80X25MM 12VDC WIRE	200
FAD1-04010CSHW11 Qualtek Electronics Corp.	FAN AXIAL 40X10MM 12VDC WIRE	0
FAD1-08025CAAW11 Qualtek Electronics Corp.	FAN AXIAL 80X25MM 12VDC WIRE	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%)