Description
Delta AUB0524HHD is an industrial-grade 50 x 50 x 20 mm (1.97 x 1.97 x 0.79 in) DC brushless tubeaxial cooling fan engineered for high-density electronic and automation enclosures. Driven by an energy-efficient two-phase, four-pole motor operating at 24 VDC, this cooling fan delivers up to 18.30 CFM (31.08 m³/h) of volumetric airflow and a static pressure head of 0.254 in H₂O (63.2 Pa) at a rated speed of 6400 RPM. The structural assembly incorporates UL 94V-0 flame-retardant plastic housing and impeller elements paired with Delta’s proprietary Superflo sleeve bearing system for quiet, reliable thermal operation up to 50,000 hours. Pre-terminated with 24 AWG lead wires, the fan features integrated reverse polarity safeguarding and locked-rotor shutdown protection to maintain continuous reliability in compact systems.
Key Features
- Proprietary Superflo Bearing: Ensures quiet acoustic performance and extended mechanical operating endurance rated to 50,000 hours at 40°C.
- Robust Aerodynamic Pressure: Develops 0.254 in H₂O static head and 18.3 CFM airflow to overcome compact enclosure resistance.
- UL 94V-0 Rated Materials: Features flame-retardant thermoplastic housing and impeller engineered to withstand severe industrial operating conditions.
- Comprehensive Motor Protection: Integrated circuitry includes automatic locked-rotor current shutdown and full reverse polarity connection resistance.
- Wide Voltage Capability: Operates reliably across an extended 14.0 to 27.6 VDC supply range for fluctuating power systems.
Technical Specifications
| Manufacturer | Delta |
|---|---|
| Manufacturer Part Number (MPN) | AUB0524HHD |
| Delta Safety Model Number | AUB0524HHD |
| Product Series | AUB Series |
| Product Category | DC Axial Fans |
| Fan / Component Type | DC Brushless Tubeaxial Fan |
| Motor Architecture | 2-Phase, 4-Pole Brushless DC Motor |
| Supply Voltage Type | DC |
| Rated Voltage | 24 VDC |
| Operating Voltage Range | 14.0 to 27.6 VDC |
| Rated Input Current | 0.09 A |
| Maximum Input Current | 0.14 A |
| Safety Current on Label | 0.14 A |
| Rated Input Power | 2.16 W |
| Maximum Input Power | 3.36 W |
| Nominal Rotational Speed | 6400 RPM |
| Maximum Airflow (Nominal) | 18.30 CFM (0.518 m³/min / 31.08 m³/h) |
| Minimum Airflow Rating | 16.25 CFM (0.460 m³/min / 27.60 m³/h) |
| Maximum Static Pressure (Nominal) | 0.254 in H₂O (6.44 mmH₂O / 63.2 Pa) |
| Minimum Static Pressure Rating | 0.193 in H₂O (4.89 mmH₂O / 48.0 Pa) |
| Acoustical Noise Level (Average) | 37.0 dB(A) |
| Noise Test Standard | 1 Meter Free Air in Anechoic Chamber (Microphone at Fan Intake) |
| Airflow Direction | Axial (Intake Over Struts, Exhaust Face) |
| Direction of Rotation | Clockwise (Viewed from Nameplate Side) |
| Bearing Type | Superflo Bearing System |
| External Cover | Open Type |
| Frame Dimensions | 50.0 mm x 50.0 mm (1.97 in x 1.97 in) |
| Frame Thickness / Depth | 20.0 mm (0.79 in) |
| Mounting Hole Pitch | 40.0 ± 0.3 mm (1.575 ± 0.012 in) |
| Mounting Hole Diameter | 4-Ø4.5 ± 0.3 mm (4-Ø0.177 ± 0.012 in) |
| Housing / Frame Material | Thermoplastic (UL 94V-0) |
| Impeller Material | Thermoplastic (UL 94V-0) |
| Termination Type | 2 Wire Leads |
| Lead Wire Specification | UL 1007 -F- AWG #24 |
| Wiring Pinout | Red: Positive (+), Black: Negative (-) |
| Motor Protection | Impedance Protected (Locked Rotor Current Shutdown up to 96 Hours) |
| Polarity Protection | Reverse Connection Withstanding Protection |
| Insulation Class | 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 (Between Frame and (+) Terminal) |
| Operating Temperature Range | -10 °C to +60 °C (14 °F to 140 °F) |
| Storage Temperature Range | -40 °C to +70 °C (-40 °F to 158 °F) |
| Operating Humidity Range | 5% to 90% RH (Non-Condensing) |
| Storage Humidity Range | 5% to 95% RH |
| Service Life Expectancy (L10) | 50,000 Hours Continuous Operation at 40 °C, 15% to 65% RH |
| Product Weight | 38 g (0.084 lbs / 1.34 oz) |
| Production Locations | China or Thailand |
| Safety Certifications & Compliance | UL, CSA, VDE, CE, RoHS 3 Compliant |
| Ozone Depleting Substances | Zero PBBs, PBBOs, CFCs, PBBEs, PBDPEs, HCFCs |
Applications
Delta AUB0524HHD compact axial cooling fans are deployed across space-constrained industrial electronics requiring concentrated airflow and high reliability. Common installations include telecommunications rectifiers, DIN-rail power supplies, compact programmable logic controller (PLC) modules, and embedded industrial PC enclosures. They also serve as dedicated forced-convection spot-coolers for medical diagnostic analyzers, laboratory instruments, and automated vision systems where consistent thermal dissipation is critical.
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