Description
Delta PFB0824UHEP5 is a high-pressure 24VDC brushless tubeaxial cooling fan engineered in a standard 80 × 80 × 38 mm (3.15 × 3.15 × 1.50 in) industrial square housing. Delivering an impressive maximum airflow of 107.3 CFM (182.3 m³/h) and static pressure of 1.368 in H₂O (340.8 Pa) at 7500 RPM, it overcomes high system impedance in densely packed electronic assemblies. Built with UL 94V-0 flame-retardant plastic, dual ball bearings, and IP55 ingress protection, this fan provides 70,000 hours of continuous operation (L10 at 40 °C). The four-wire interface incorporates precise 25 kHz PWM variable speed control and an open-collector frequency generator (tachometer) output alongside built-in locked-rotor and polarity protection.
Key Features
- High-Static Aerodynamics: Produces 107.3 CFM airflow and 1.368 in H₂O pressure to pierce high-impedance thermal loads.
- Environmental Protection: Certified IP55 ingress resistance safeguards against airborne dust and high-humidity water spray ingress.
- Intelligent Control Interface: Features 25 kHz PWM input and open-collector tachometer feedback for precise closed-loop speed regulation.
- Durable Ball Bearings: Heavy-duty two ball bearing system ensures an L10 operating life exceeding 70,000 hours at 40 °C.
- Robust Circuit Protection: Integrates reverse polarity defense and automatic shut-down locked rotor protection preventing coil burnout.
Technical Specifications
| Manufacturer | Delta |
|---|---|
| Manufacturer Part Number (MPN) | PFB0824UHEP5 |
| Delta Safety Model Number | PFB0824UHE |
| Product Series | PFB Series |
| Product Category | DC Axial Fans |
| Fan Type | Brushless Tubeaxial Fan |
| Rated Voltage | 24 VDC |
| Operating Voltage Range | 14.0 to 26.4 VDC |
| Rated Current (Average) | 0.77 A |
| Max. Current Draw | 0.89 A |
| Safety Current on Label | 0.93 A |
| Input Power (Average) | 18.48 W |
| Max. Input Power | 21.36 W |
| Nominal Speed | 7500 RPM ± 10% |
| Maximum Airflow | 107.3 CFM (182.3 m³/h / 3.038 m³/min) |
| Minimum Airflow Rating | 96.57 CFM (164.1 m³/h / 2.734 m³/min) |
| Maximum Static Pressure | 1.368 in H₂O (340.8 Pa / 34.75 mmH₂O) |
| Minimum Static Pressure Rating | 1.108 in H₂O (276.0 Pa / 28.14 mmH₂O) |
| Acoustical Noise Level (Average) | 61.0 dB(A) |
| Max. Acoustical Noise Level | 65.0 dB(A) |
| Noise Measuring Distance | 1 m (Semi-Anechoic Chamber, Intake Side) |
| Airflow Direction | Intake over Struts / Clockwise View from Nameplate |
| Dimensions (L × H × D) | 80 × 80 × 38 mm (3.15 × 3.15 × 1.50 in) |
| Housing Material | Plastic (UL 94V-0) |
| Impeller Material | Plastic (UL 94V-0) |
| Bearing System | Two Ball Bearings |
| Weight | 185 g (0.408 lbs) |
| Termination Type | 4 Wire Leads |
| Lead Wire Specification | UL 1061 AWG #24 |
| Wiring Pinout | Red: (+), Black: (-), Blue: (F00 / FG Tach), Yellow: (PWM) |
| Speed Control Feature | Pulse-Width Modulation (PWM) |
| PWM Control Signal Voltage | 0 to 15 VDC (Low: 0.8 VDC max, High: 3.3 to 15 VDC) |
| PWM Operating Frequency | 25 kHz (Preferred) |
| Min. Started Duty Cycle | 30% (at 25 °C, Rated Voltage) |
| Tachometer / Speed Sensor | Frequency Generator (FG) Open Collector Mode, 4 Poles |
| Max. FG Collector Voltage (VFG) | Vcc max (5.0 V Typ.) |
| Max. FG Collector Current (Ic) | 5 mA max |
| Max. FG Saturation Voltage (VCE) | 0.8 V max |
| Motor Protection | Locked Rotor Protection (Electronic Current Shutdown / 96h Coil Impedance) |
| Polarity Protection | Withstands Reverse Voltage Connection |
| Insulation Type | UL Class A |
| Insulation Resistance | 10 MΩ min. at 500 VDC (Between Frame and (+) Terminal) |
| Dielectric Strength | 5 mA max. at 500 VAC 50/60 Hz for 1 Minute |
| Ingress Protection Rating | IP55 (IEC 60529 Dust Protected & Water Jet Resistant) |
| Operating Temperature Range | -10 °C to +70 °C (14 °F to 158 °F) |
| Storage Temperature Range | -40 °C to +75 °C (-40 °F to 167 °F) |
| Operating Humidity Range | 5% to 90% RH (Non-Condensing) |
| Storage Humidity Range | 5% to 95% RH (Non-Condensing) |
| Service Life (L10) | 70,000 Hours at 40 °C (15% to 65% RH) |
| Safety Certifications & Compliance | cURus, VDE, CE, RoHS Compliant |
Applications
Delta PFB0824UHEP5 axial cooling fans are deployed across high-density telecommunications rectifiers, modular DC power supplies, and outdoor cellular baseband enclosures requiring dust and splash resistance. Within industrial automation, this fan provides forced-air cooling for variable frequency drives, CNC servo control units, robotics controllers, and PLC backplanes. It also delivers reliable thermal dissipation for high-current welding machinery, uninterruptible power supply (UPS) inverter chassis, and commercial solar microinverters.
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