Product Details

1. Product Overview

The COOLTRON FD1751B24W7-3P-61 is a high-performance DC axial fan designed for demanding industrial cooling applications. Boasting a robust 172x150x51mm size, dual ball bearing construction, and a 3rd wire speed sensor, it delivers powerful airflow, precise speed monitoring, and long-term reliability—ideal for equipment requiring consistent and controllable cooling.

2. Core Specifications

• Dimensions: 172mm (length) × 150mm (width) × 51mm (height)
• Voltage: Rated DC 24V; Operating range DC 12.0V ~ 24V; Starting voltage DC 12.0V (25℃, 65% RH)
• Electrical Parameters: Max. Rated Current 1.20A; Power Consumption 28.80W; Actual Current not specified
• Performance: Rated Speed 4000 RPM (±10% tolerance, after 10 mins rotating in free air at 25℃, 65% RH); Maximum Airflow 288.00 CFM (AMCA Standard); Maximum Static Pressure 27.73 mm-H₂O
• Noise Level: 60.41 dB(A) (measured in non-echo chamber, compliant with CNS 8753 and ISO 3744)
• Service Life: 70,000 hours (MTTF, 90% confidence level) at 25℃

3. Electrical Characteristics

• Locked Rotor Protection: Auto power-off after 1 second of lock at rated voltage; automatic restart attempt every 2-6 seconds
• Polarity Protection: Circuit protected against reverse connection (VCC & GND exchange); no burnout within 5 seconds
• Insulation Resistance: 10 MΩ between unshielded wire and frame (tested at 500 VDC/min)
• Dielectric Strength: Maximum 5 mA (measured between positive lead wire and frame at 500 VAC/min)
• Lead Wire & Connector: UL Type #22 AWG (Red: +, Black: -, White: Speed Sensor); 3-pin connector for easy integration

4. Environmental Ratings

• Operating Conditions: Temperature -10℃ ~ +70℃, Humidity 35% ~ 85% RH
• Storage Conditions: Temperature -40℃ ~ +70℃, Humidity 35% ~ 85% RH
• Reliability Tests:
  • High & Low Temperature Test: 2 cycles of -10℃ and 70℃, 4 hours per cycle
  • Packaging Tests: 3-axis (X/Y/Z) 1.1G vibration test (30 mins); 60cm drop test (1 corner, 3 edges, 6 faces, packed)

5. Safety & Compliance

• Certifications: CE (File No.: TB10088262), UL (File No.: E194726), CUL (File No.: E194726), TUV (File No.: R50048194)
• Label Marking: Fan label includes safety approval, model number & appendix code, rated voltage, power consumption, bearing type, and location; RoHS & date code marked on fan outlet frame

6. Design & Construction

• Bearing Type: Dual ball bearing for enhanced durability and stability
• Blade & Housing: 5-blade design; Blade material: PBT (UL 94V-0 flame-retardant); Housing: Die-cast aluminum
• Motor & Rotation: 4 poles; Rotating direction: Counter-clockwise (viewed from rotor side)
• Net Weight: 750 grams

7. Usage Notes

• Not suitable for environments with aggressive or corrosive fluids
• Avoid applying pressure to the impeller, handling by lead wires, or dropping to prevent damage
• Correct mounting is critical to avoid excess resonance, vibration, or noise
• Store per specified temperature/humidity; functional testing recommended for storage over 6 months
• All specifications are measured at 25℃, 65% RH under free air and vertical setup
• Use a safety guard during testing to prevent personal injury

Contact Us：sales.usa@cooltron.com
Visit Website：https://www.cooltron.com/