Customer Requirement
A leading automation equipment manufacturer approached us with a critical thermal management challenge: they needed a compact DC axial fan to be integrated into their automation controller. The cooling solution has to provide reliable airflow performance without requiring additional power conversion components for a densely packed PCB assembly.
Based on the controller’s thermal simulation data and operating conditions, our engineering team reverse-engineered the fan performance requirements to define the optimal cooling specification.
The fan designed will deliver a minimum airflow of 42 CFM (71 m³/h) at free air and generate enough static pressure, at least 5.51 mmH₂O, to maintain airflow through intake filters and past obstructing components. The target of the noise was a maxium of 38 dBA to meet workplace environment standards.
Engineering Solution
The engineering team immediately focused on the LWAD8025 DC axial fan series. This 80mm frame size is a standard offering, providing multiple performance points. Operating at 3600 RPM from a 24 VDC supply, it delivers 42.02 CFM and a maximum static pressure of 5.51 mmH₂O. Its 38 dBA noise level was at the acceptable limit for this type of industrial equipment. The key decision was the bearing system. To meet the 50,000-hour life expectancy requirement, two-ball bearings were specified over sleeve bearing options. Ball bearings offer superior longevity and stability, particularly in the higher ambient temperatures expected inside an electronics cabinet. The frame of and impeller of the fan are made from PBT plastic with a UL rating and the motor design includes impedance-based locked rotor protection.
Technical Specifications
| Parameter | Value |
|---|---|
| Model Number | LWAD8025MX-31-00 |
| Dimensions | 80 x 80 x 25 mm |
| Rated Voltage | 24.0 VDC |
| Operation Voltage | 12.0 – 26.5 VDC |
| Input Current | 0.26 A |
| Input Power | 3.12 W |
| Speed | 3600 RPM (±10%) |
| Maximum Airflow (at 0 Static Pressure) | 42.02 CFM / 71.4 m³/h |
| Maximum Static Pressure (at 0 Airflow) | 5.51 mmH₂O / 54 Pa |
| Acoustical Noise (Avg.) | 38 dBA |
| Bearing Type | Two Ball Bearings |
| Life Expectancy | 50,000 Hours (continuous operation at 25°C, 15-65% RH) |
| Frame & Impeller Material | PBT Plastic (UL 94V-0) |
| Insulation Type | UL Class A |
| Locked Rotor Protection | Protects motor for 72 hours in locked rotor condition |
| Operating Temperature | -10°C to +60°C |
| Weight | 75 Grams |
| Lead Wire | UL1007 28AWG, Length 300mm (PIN1: Black -, PIN2: Red +) |
The combination of 42.02 CFM airflow and 54 Pa of static pressure in an 80mm frame allows this model to effectively cool enclosures by overcoming the impedance of filters, heat sinks, and densely packed circuit boards.
Technical Documentation
The following documents were finalized and approved under project number LWAD8025MX-31.
This is the final datasheet required by design engineers for component qualification, containing all mechanical, electrical, and environmental specifications.
This product summary provides procurement managers and engineers with a quick reference for the LWAD8025 series, including performance curves and key dimensions for initial evaluation.
Why Longwell for This Application
- Speed of Response: The customer needed a standard component, not a complex custom project. Longwell’s ability to immediately identify and provide full documentation for the pre-engineered LWAD8025MX-31 from our extensive portfolio meant the customer’s design process was not delayed. No 90-day NPI cycle was needed for this straightforward requirement.
- Verified Compliance & Safety: The fan is constructed with UL 94V-0 rated PBT plastic and features UL Class A motor insulation. Longwell’s deep experience in navigating UL 507 and CE certification gives procurement managers confidence that the fan will not become a bottleneck for the end-product’s global market launch.
- Scalable Supply Chain: As a standard product manufactured for over 35 years in Ningbo, the LWAD8025MX-31 is supported by a mature and high-volume supply chain and engineering team. This assures the OEM of stable lead times and our capacity to ramp up production to meet their demand, from initial pilot runs to full-scale manufacturing.
- High Energy Efficiency: Longwell’s DC cooling axial fans adopt brushless DC motor technology, which can consume up to 70% less energy than equivalent AC motor fans
Explore our full DC Axial Fans range.
Frequently Asked Questions
Q: What is the expected L10 life expectancy if the fan operates continuously at its maximum rated temperature of 60°C?
A: The stated 50,000-hour L10 life is rated at a 25°C ambient temperature. Bearing life is inversely affected by heat. A general engineering rule suggests that for every 10°C rise in continuous operating temperature, the bearing life is halved. For applications needing longer life at high temperatures, we can propose alternative high-temperature grease or bearing systems.
Q: Does LONGWELL provide other types of ventilation fans?
A: Yes. LONGWELL offers a comprehensive range of ventilation and air movement solutions, including cross-flow fans, axial fans, centrifugal fans, EC fans, and customized fan assemblies to meet different application requirements. With in-house engineering capabilities, advanced testing facilities, and flexible customization options, LONGWELL fan solutions are widely used in industries such as HVAC systems, data center cooling, industrial ventilation and dust collection, cold chain, BESS, and other applications.
Q: Is a version of this fan available with PWM speed control for dynamic thermal management?
A: The LWAD8025MX-31 is a standard 2-wire (power and ground) fixed-speed fan. However, a 4-wire version incorporating PWM speed control via our SmartEC™ platform is available as a semi-custom product. This modification typically requires a 90-day New Product Introduction (NPI) cycle for design, sampling, and validation for the first order.
Technical Documentation & Resources
Project Gallery & Technical Drawings
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🏆 ISO 9001 / ISO 14001 / ISO 45001 | CE (TÜV) | UL/ETL | ATEX Zone 21/22 | AMCA 210-16 / ISO 5801 tested
Project Item: 6994808190-LWAD8025MX-31
Project Date: 2026-05-19 06:22:13
