Description
The 17251 is a heavy-duty 172mm axial fan with a 51mm thick body, capable of moving over 300 CFM. Its die-cast aluminum frame and dual ball bearings ensure durability in demanding environments. Available in 12V, 24V, and 48V with PWM control, it’s engineered for server racks, telecom base stations, and large UPS enclosures that require powerful, reliable ventilation.
172x150x51MM (6.77″x5.90″x2.00″)-DC COOLING FAN SERIES
| MODEL： | FH17251 |
| VOLTAGE： | 12V/24V/48V |
| MATERIAL: | Frame: Plastic (UL94V-0)/Impeller: Plastic (UL94V-0) |
| EXPECTED LIFE: | Ball Bearing 50,000hrs (40°C) |
| SAFETY STANDARDS: | CCC,ROHS,CE,ISO9001 |
Die-cast aluminum alloy frame, robust and durable
– the metal frame is far stronger than plastic, impact-resistant, and anti-aging, suitable for harsh environments such as outdoor base stations and high-temperature workshops.
Multi-voltage support, adaptable to industrial systems
– available in 12V/24V/48V DC versions, covering power supply standards for various industries such as communication base stations, power cabinets, and server racks.
Dual ball bearings, long lifespan and maintenance-free
– 50,000 hours of continuous operation, resistant to temperatures up to 75℃, suitable for 24/7 unattended base stations and data centers.
Why Choose Us?
- Certifications: CE, RoHS, FCC certified, compliant with international export standards.
- Dropshipping: Supports small batch mixed orders and sample testing.
- OEM/ODM: Highly customizable wires, terminals, and coating colors to suit your equipment needs.
| P&Q CURVE (AT RATED VOLTAGE) | DIMENSIONS DRAWING |
| Model | Bearing Type | Rated Voltage | Operating Voltage Range | Rated Current | Rated Input Power | Speed | Maximum Air Flow | Maximum Air Pressure | Noise | Weight | ||||||||||||||||||||||||||||||||||||||||||
| PART NO. | B/S/Y | VDC | VDC | AMP | WATT | R.P.M | m3/min | CFM | mmH2O | INH2O | DB-A | g | ||||||||||||||||||||||||||||||||||||||||
| FH17251-A | B | 12 | 6.0 to 13.5 | 0.65 | 7.8 | 2500 | 4.877 | 172.21 | 10.92 | 0.43 | 56.1 | 1000 | ||||||||||||||||||||||||||||||||||||||||
| 12 | 6.0 to 13.5 | 0.92 | 11.04 | 3000 | 5.930 | 209.40 | 15.33 | 0.60 | 58.3 | 1000 | ||||||||||||||||||||||||||||||||||||||||||
| 12 | 6.0 to 13.5 | 1.60 | 19.2 | 3500 | 7.026 | 248.09 | 21.33 | 0.84 | 62.5 | 1000 | ||||||||||||||||||||||||||||||||||||||||||
| 12 | 6.0 to 13.5 | 2.40 | 28.8 | 4000 | 8.015 | 283.00 | 27.36 | 1.08 | 65.5 | 1000 | ||||||||||||||||||||||||||||||||||||||||||
| 12 | 6.0 to 13.5 | 3.30 | 39.6 | 4500 | 9.220 | 325.57 | 37.57 | 1.48 | 68.2 | 1000 | ||||||||||||||||||||||||||||||||||||||||||
| 12 | 6.0 to 13.6 | 4.20 | 50.4 | 5000 | 10.243 | 361.69 | 45.36 | 1.79 | 71.4 | 1000 | ||||||||||||||||||||||||||||||||||||||||||
| 24 | 18.0 to 26.5 | 0.33 | 7.92 | 2500 | 4.877 | 172.21 | 10.92 | 0.43 | 56.1 | 1000 | ||||||||||||||||||||||||||||||||||||||||||
| 24 | 18.0 to 26.5 | 0.46 | 11.04 | 3000 | 5.930 | 209.40 | 15.33 | 0.60 | 58.3 | 1000 | ||||||||||||||||||||||||||||||||||||||||||
| 24 | 18.0 to 26.5 | 0.80 | 19.2 | 3500 | 7.026 | 248.09 | 21.33 | 0.84 | 62.5 | 1000 | ||||||||||||||||||||||||||||||||||||||||||
| 24 | 18.0 to 26.5 | 1.20 | 28.8 | 4000 | 8.015 | 283.00 | 27.36 | 1.08 | 65.5 | 1000 | ||||||||||||||||||||||||||||||||||||||||||
| 24 | 18.0 to 26.6 | 1.65 | 39.6 | 4500 | 9.220 | 325.57 | 37.57 | 1.48 | 68.2 | 1000 | ||||||||||||||||||||||||||||||||||||||||||
| 24 | 18.0 to 26.5 | 2.10 | 50.4 | 5000 | 10.243 | 361.69 | 45.36 | 1.79 | 71.4 | 1000 | ||||||||||||||||||||||||||||||||||||||||||
| 48 | 36.0 to 54.0 | 2.60 | 124.8 | 2500 | 4.877 | 172.21 | 10.92 | 0.43 | 56.1 | 1000 | ||||||||||||||||||||||||||||||||||||||||||
| 48 | 36.0 to 54.0 | 0.92 | 44.16 | 3000 | 5.930 | 209.40 | 15.33 | 0.60 | 58.3 | 1000 | ||||||||||||||||||||||||||||||||||||||||||
| 48 | 36.0 to 54.0 | 0.40 | 19.2 | 3500 | 7.026 | 248.09 | 21.33 | 0.84 | 62.5 | 1000 | ||||||||||||||||||||||||||||||||||||||||||
| 48 | 36.0 to 54.0 | 0.60 | 28.8 | 4000 | 8.015 | 283.00 | 27.36 | 1.08 | 65.5 | 1000 | ||||||||||||||||||||||||||||||||||||||||||
| 48 | 36.0 to 54.0 | 0.83 | 39.84 | 4500 | 9.220 | 325.57 | 37.57 | 1.48 | 68.2 | 1000 | ||||||||||||||||||||||||||||||||||||||||||
| 48 | 36.0 to 54.0 | 1.05 | 50.4 | 5000 | 10.243 | 361.69 | 45.36 | 1.79 | 71.4 | 1000 | ||||||||||||||||||||||||||||||||||||||||||
| 提示1:如果您需要的转速,电压,或者其它功能不在这清单上，请与我们联系. If you want another RPM,voltage or functions which one in the lise ,please contact our sales. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| 提示2:以上数据仅供参考,产品详细信息请参照承认书,如有变更恕不另行通知. Above specifcations are only for reference ,product have a detail in the approcal sheet, if specifaction are subject to change without notice. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
FAQ
What does IP54 protection level mean?
IP54 indicates dustproof (does not produce harmful deposits) and splashproof (no harmful effects from water spray in all directions), suitable for outdoor cabinets, workshops and other environments with dust or splashes.
Can we get samples for testing for free?
Yes, we can provide free sample testing for low-cost products.
What is the warranty period for a fan?
Under normal usage conditions, we offer a 12-month warranty period.
How to get the samples?
First, contact us at [email protected]. Then, tell us your product requirements (voltage, size, speed, etc.). After receiving your information and confirming your requirements, we will produce a sample within three days.
AI Liquid Cooling Application: Large-Format Cooling for High-Power AI Infrastructure
The Fengheng 172×51mm fan series — available in both DC and EC motor versions — is designed for high-airflow, high-static-pressure applications in AI data center liquid cooling infrastructure where 120mm fans cannot deliver sufficient airflow per unit.
Why 172mm for AI Liquid Cooling?
As rack power densities exceed 100 kW and CDU systems scale to serve 20+ racks, the airflow requirements of individual RDHx doors and CDU cabinets increase beyond what arrays of small fans can efficiently handle. The 172mm format provides:
- 3–4× the swept area of a 92mm fan — delivering substantially more airflow per motor and per power watt
- Lower RPM at equivalent CFM — reducing acoustic noise and extending bearing life in 24/7 operations
- Fewer fans per installation — reducing system complexity, wiring cost, and failure points in critical CDU cooling systems
Application Scenarios
Large CDU Cabinet Cooling (EC version recommended): The 172×51mm EC fan with integrated inverter supports direct connection to 200–240V AC supplies, making it ideal for floor-standing CDU cabinets. EC motors provide 30–40% lower power consumption versus AC motors at equivalent airflow — with modulating speed control for efficient partial-load operation.
RDHx for Ultra-High-Density Racks (DC version): For racks exceeding 100 kW (NVIDIA GB200 NVL72, AMD Instinct MI300X multi-node), the 172×51mm DC fan in a 2×3 or 2×4 array delivers sufficient static pressure and airflow to active RDHx doors handling extreme heat loads.
Telecom + Edge AI Node Air Handling: 5G base stations and edge AI compute nodes with liquid-cooled processing units use 172mm fans for their outer enclosure air handling — circulating external air across heat exchanger fins to reject CDU heat.
Liquid Cooling Test Infrastructure: Data center cooling test labs and thermal simulation chambers use 172mm fans to provide precisely controlled airflow for evaluating CDU, RDHx, and cold plate thermal performance.
DC vs EC: Which for Your Application?
| Feature | 172×51mm DC | 172×51mm EC |
|---|---|---|
| Input voltage | 12V / 24V / 48V DC | 200–240V AC |
| Speed control | PWM (4-wire) | 0–10V or Modbus |
| Motor efficiency | 85–90% | 90–95% |
| Best for | IT rack RDHx, OCP Open Rack | CDU cabinets, standalone cooling units |
| MTBF | ≥70,000h (dual ball bearing) | ≥60,000h |
Custom voltage, connector, IP rating, and speed control options available for OEM CDU and RDHx manufacturers. CE, RoHS, VDE certified.
Request 172mm Fan Datasheet for Liquid Cooling Applications →
