DC Brushless Fans (BLDC)

Part Number	Description / PDF	Quantity
17000180A Comair Rotron	FAN 50X10.5MM CR0512UB-G70(T)	0
17000172A Comair Rotron	FAN AXIAL 40X15MM CR0412MB-D51	0
17000298A Comair Rotron	FAN AXL 254X88.9MM CD24B7 24VDC	42
17000184A Comair Rotron	FAN AXL 80X32MM CR08012LB327B00	0
19044013A Comair Rotron	FAN 80X32MM 12VDC ST12B3-E2	0
17000192A Comair Rotron	FAN 80X32MM CR0812UB-Y51(NCU)	0
17000178A Comair Rotron	FAN 51.11X15MM CRB05112HB150300	0
17001176A Comair Rotron	FAN DC IP68 GLD12Z3E2X-E3	18
19043193A Comair Rotron	FAN AXIAL 127X38MM 12V PQD48B6D3	0
17000207A Comair Rotron	CR0312HB-G50-ALARM SENSOR	0
17001157A Comair Rotron	FAN DC IP68 MSD24B3E2X-E3	14
16005235A Comair Rotron	FAN 112VDC 127X38MM GL12R7HT	1
17001204A Comair Rotron	PQD12B3-E3	0
17000188A Comair Rotron	FAN AXL 80X15.5MM CR0812LB-D9*GP	0
17001202A Comair Rotron	JQD24B3-E3	19
TD48B6NDNX Comair Rotron	FAN AXIAL 175.5X107.2MM 48VDC	0
17000191A Comair Rotron	FAN 80X32MM CR0824UB-Y51(NCU)	0
17001156A Comair Rotron	FAN DC IP68 MSD12B3E2X-E3	0
17000193A Comair Rotron	FAN 57.25X15.2MM CRB0612UB-D03	0
17001194A Comair Rotron	FAN DC IP68 PQD48K3E2X-E3	13

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%)