DC Brushless Fans (BLDC)

Part Number	Description / PDF	Quantity
4312NHH ebm-papst Inc.	FAN AXIAL 12VDC 119X32MM 147CFM	8
3312NHH ebm-papst Inc.	FAN AXIAL 92X32MM 12VDC 3.4W WR	0
8318/17 ebm-papst Inc.	FAN AXIAL 80X32MM 48VDC WIRE	43
4184NX ebm-papst Inc.	FAN AXIAL 119X38MM 24VDC TERM	343
3258J/2H3PU ebm-papst Inc.	FAN AXIAL 48VDC 92X92X38MM 158CF	25
3214JH3 ebm-papst Inc.	FAN AXIAL 92X38MM 24VDC WIRE	441
8412N/2 ebm-papst Inc.	FAN AXIAL 80X25MM 12VDC	1418
5314/2TDHHP ebm-papst Inc.	FAN AXIAL 140X50.8MM 24VDC WIRE	20
RG160-28/18N/2TDPU-331 ebm-papst Inc.	FAN 48VDC 220X56MM IP68 TACH	18
5214NHH ebm-papst Inc.	FAN AXIAL 127X38MM 24VDC	1226
8414N/2GM ebm-papst Inc.	FAN AXIAL 80X25MM 24VDC	32
4182NX ebm-papst Inc.	FAN AXIAL 119X38MM 12VDC TERM	0
5112N ebm-papst Inc.	FAN AXIAL 135X38MM 12VDC WIRE	1225
5114N/2 ebm-papst Inc.	FAN AXIAL 135X38MM 24VDC	1810
622L ebm-papst Inc.	FAN AXIAL 60X25.4MM 12VDC WIRE	29
614N/2M ebm-papst Inc.	FAN 24VDC 60X25MM TACH	67
4314NHH ebm-papst Inc.	FAN AXIAL 119X32MM 24VDC WIRE	63
RER125-19/12N ebm-papst Inc.	FAN IMP MTRZD 138X35MM 12VDC	55125
4312/2U ebm-papst Inc.	FAN 12VDC 119X32MM IP68 TACH	0
3414NHH ebm-papst Inc.	FAN AXIAL 92X25.4MM 24VDC WIRE	78

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%)