17251D DC Axial Flow Fan – 172.5×150.5×51 mm High-Power Cooling for Industrial & Defense Applications
The Senharfans 17251D DC Axial Flow Fan is engineered for high-density, mission-critical electronic systems, including radar modules, naval electronics, airborne platforms, and industrial power systems.
Featuring an aluminum alloy frame, dual ball bearings, and high-power DC motor design, the 17251D delivers extremely high airflow and static pressure while maintaining long service life and environmental reliability.
Structural Design
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Frame: Aluminum Alloy
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Impeller: Engineering Plastic
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Bearing: Dual Ball Bearings
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Weight: 750 g
The reinforced aluminum structure ensures durability, vibration resistance, and stable operation under high RPM and environmental stress.
Performance Specifications
| Model | Voltage | Power | Speed | Airflow | Static Pressure | Noise |
|---|---|---|---|---|---|---|
| J172FZW245-51D00 | 24V | 28.7 W | 4500 RPM | 491.6 m³/h | 244.2 Pa | 67.4 dBA |
| J172FZW270-51D00 | 24V | 108 W | 7000 RPM | 764.7 m³/h | 591 Pa | 77.1 dBA |
| J172FZW295-51D00 | 24V | 270 W | 9500 RPM | 1203.8 m³/h | 1562.6 Pa | 83.7 dBA |
| J172FZW345-51D00 | 28V | 28.7 W | 4500 RPM | 491.6 m³/h | 244.2 Pa | 67.4 dBA |
| J172FZW370-51D00 | 28V | 108 W | 7000 RPM | 764.7 m³/h | 591 Pa | 77.1 dBA |
| J172FZW395-51D00 | 28V | 270 W | 9500 RPM | 1203.8 m³/h | 1562.6 Pa | 83.7 dBA |
Other voltages available: 5V, 12V, 48V
Signal Functions
The 17251D supports configurable intelligent signals:
| Code | Function |
|---|---|
| 0 | No Function |
| 1 | PWM Duty Cycle Speed Control |
| 2 | High-Level Fault Alarm |
| 3 | Tachometer (RPM) Feedback |
| 4 | PWM + High-Level Fault Alarm |
| 5 | PWM + Tachometer Feedback |
Environmental Adaptability
The 17251D can meet GJB military/industrial standards, including:
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High/Low Temperature: –55°C to +85°C (airborne configuration)
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Rain / Water Ingress: 1 hour per surface
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Humidity / Damp Heat: cyclic 30–60°C, RH 95%, 10 cycles
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Fungus Resistance: 28 days
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Salt Spray: Neutral / Acidic 192 hours
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Sand & Dust: Blowing test
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Acceleration / Shock: 9g / 40g
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Low Air Pressure: 6.3 kPa
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EMC Compliance: RE102 / CE102
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Overvoltage: 80V/50ms
Suitable for:
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Radar & defense electronics
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Naval and marine systems
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Airborne and UAV platforms
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Industrial high-power electronics
Key Advantages
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Large 172 mm diameter for high airflow and pressure
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Aluminum alloy rugged frame
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Dual ball bearing long-life design
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Multi-voltage support
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Intelligent signal options (PWM / Tachometer / Alarm)
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Military and industrial environmental adaptability
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OEM project customization support
Contact Senharfans engineering team for technical drawings, airflow curves, or custom project requirements.
