DC Brushless Fans (BLDC)

Part Number	Description / PDF	Quantity
W3G300-BV25-21 ebm-papst Inc.	FAN AXIAL 26VDC 330X76.5MM	15
DV6318/2TDH5P ebm-papst Inc.	FAN AXIAL 171.5X50.8MM 48VDC	59
8212J/2H4P ebm-papst Inc.	FAN AXIAL 80X38MM 12VDC	0
3218JN ebm-papst Inc.	FAN AXIAL 92X38MM 48VDC	17
RG225-55/14/2TDMLO ebm-papst Inc.	270 X 119 MM DC CENTRIFUGAL FAN	0
RER101-36/12N/2HHPR-181 ebm-papst Inc.	FAN IMP MTRZD 101X51.7MM 12VDC	92
414/2H ebm-papst Inc.	FAN 24VDC 40MM 24VDC W/TACH	0
RER225-55/18/2TDMO ebm-papst Inc.	225 X 99 MM DC CENTRIFUGAL FAN	0
QG030-198/12 ebm-papst Inc.	FAN BLOWER CF 258X47.5MM 12VDC	62
5218NN ebm-papst Inc.	FAN AXIAL 127X38MM 48VDC WIRE	11
614F ebm-papst Inc.	FAN AXIAL 60X15MM 24VDC WIRE	653
G2G097-AA16-01 ebm-papst Inc.	FAN BLOWER 143X41MM 24VDC WIRE	0
3318NH3 ebm-papst Inc.	FAN AXIAL 92X32MM 48VDC 6.5W WR	21
4182NXH ebm-papst Inc.	FAN AXIAL 119X38MM 12VDC TERM	46
RLF100-11/12/2 ebm-papst Inc.	DC FLATPAK - RADIAL BLOWER	103
DV5212N ebm-papst Inc.	FAN AXIAL 127X38MM 12VDC WIRE	18
8414N/2G ebm-papst Inc.	FAN AXIAL 80X25MM 24VDC	0
3212J/2N-301 ebm-papst Inc.	FAN AXIAL 92X38MM 12VDC	95
4312/17MT ebm-papst Inc.	FAN AXIAL 119X32MM 12VDC WIRE	40
2218F/2TDH4P ebm-papst Inc.	FAN AXIAL 48VDC 200X51MM 718CFM	25

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%)