40mm DC Axial Fan Series: Compact Cooling for Small-Scale Systems
Designed for tight spaces and low-power applications, SZR's 40mm DC axial fan series delivers reliable, efficient cooling in a 40×40mm footprint. Available in thicknesses from 7mm to 56mm, these fans balance compact dimensions with consistent airflow, making them ideal for devices where space is at a premium. Built with UL94V-0 plastic components and supporting both sleeve and ball bearing configurations, the series operates on 5V, 12V, or 24V DC inputs to fit a wide range of power systems.
Design & Engineering Notes
The 40mm lineup caters to diverse cooling needs through varying thickness profiles:
- Slim models (4007, 4010): 7–10mm thickness optimized for ultra-compact devices (e.g., portable chargers, IoT sensors), weighing as little as 14.1g for minimal added bulk.
- Mid-range thicknesses (4015, 4020, 4024): Strike a balance between airflow and noise, suitable for consumer electronics and small home appliances.
- Thicker variants (4028, 4056): Enhanced static pressure for enclosed systems where air must pass through dense components.
All models feature color-coded wiring (red positive, black negative) for easy installation and comply with CE/RoHS standards.
Key Specs (Model 4007)
| Dimensions | 40×40×7mm |
| Rated Voltage | 5V / 12V / 24V DC |
| Operating Voltage Range | 3.6–6.8V (5V), 6.0–13.5V (12V), 18–26.5V (24V) |
| Speed Range | 5000–8000 RPM |
| Air Flow | 3–8 CFM (0.08–0.23 m³/min) |
| Noise Level | 18–28 dB(A) |
| Bearing Type | Sleeve / Ball Bearing |
| Material | Impeller & Frame (UL94V-0 Plastic) |
| Certifications | CE, RoHS |
Specifications for 4010, 4015, 4020, 4024, 4028, and 4056 are available upon request or via the SZR official catalogue.
Core Strengths
1. Ultra-Compact Footprint: Fits into spaces too small for standard cooling solutions, supporting designs where every millimeter counts.
2. Low-Power Operation: Optimized DC motor design minimizes energy draw, with some models consuming as little as 0.6W at 5V-ideal for battery-powered devices.
3. Flexible Bearing Options: Sleeve bearings for cost-effective low-noise performance; ball bearings for extended lifespan in continuous-operation scenarios.
4. Lightweight Build: Weights starting at 14.1g add minimal load to portable or vibration-sensitive equipment.
5. Wide Voltage Compatibility: 5V/12V/24V DC support ensures compatibility with most small-scale power systems.
Ideal Applications
• Portable consumer electronics (power banks, mini projectors)
• IoT devices and smart home sensors
• Small kitchen appliances (air fryers, coffee machines)
• Computer peripherals (external hard drives, mini PC cases)
• Medical monitoring equipment
• LED lighting systems
Quick Support Q&A
Q: How do I choose between different thicknesses?
A: Slimmer models (≤15mm) work best for low-static-pressure open systems; thicker variants (≥20mm) provide higher static pressure for enclosed/filtered setups.
Q: Are low-noise versions available?
A: Yes. Custom blade profiles and speed tuning reduce noise output for noise-sensitive environments like home electronics.
Q: What's the typical lifespan?
A: Sleeve bearing models offer 20,000–30,000 hours of continuous use; ball bearing versions extend this to 40,000–50,000 hours.
Our Commitment
SZR maintains strict quality control for all 40mm DC fans, with 100% functional testing before shipment. Our engineering team assists with airflow matching, model selection, and custom cooling solutions tailored to your project.
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