80mm Axial Cooling Fan 12V DC — 80×80×25mm, 3-Pin PWM

80mm Axial Cooling Fan 12V DC — 80×80×25mm, 3-Pin PWM

A standard 80×80×25mm (80mm) axial cooling fan running on 12V DC with a 3-pin connector (VCC / GND / Tachometer). The 80mm fan is the most common size for electronics enclosures, DIY power supplies, and general-purpose cooling. Higher airflow than 40mm fans — suitable for cooling larger enclosures and heat-generating components. The tachometer output allows fan speed monitoring via Arduino or fan controller.

Key Specifications

• Size: 80×80×25mm | Voltage: 12V DC
• Connector: 3-pin (VCC / GND / Tachometer)
• Airflow: ~30–40 CFM | Noise: ~30–35 dBA
• Speed: ~2000–2500 RPM
• Mounting: 4 corner M4 screw holes
• Compliance: RoHS compliant

Fan Size Comparison

• 40mm (4010): Compact, low airflow — for tight spaces
• 80mm (this fan): Standard, good airflow — for enclosures and PSUs
• 120mm+: High airflow, low noise — for large enclosures

Tachometer Output

The 3rd pin outputs a pulse signal (2 pulses per revolution). Connect to Arduino interrupt pin to measure RPM: RPM = (pulseCount / 2) × 60

Typical Applications

• Electronics enclosure ventilation
• DIY bench power supply cooling
• PC case and server cooling
• Heatsink forced-air cooling
• Arduino fan speed monitoring project

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