Description
Delta AFB0924M is an industrial-grade 24 VDC brushless tubeaxial cooling fan engineered in a standard 92 x 92 x 25.4 mm (3.62 x 3.62 x 1.00 in) square form factor. Driven by an electronically commutated two-phase, four-pole motor, the unit operates at 2450 RPM to deliver 43.79 CFM (74.4 m³/h) of airflow against 0.130 in H₂O (31.9 Pa) of maximum static pressure while drawing a low 1.92 W of power. Built with dual precision ball bearings and flame-retardant UL 94V-0 plastic for both frame and impeller, it ensures long-term operational stability with a rated service life of 70,000 hours at 40°C. Standard protection includes locked-rotor current shutdown with 96-hour winding impedance protection and full reverse polarity safeguarding, terminated through 305 mm UL 1007 AWG 24 lead wires.
Key Features
- Dual Ball Bearing System: Precision dual ball bearings deliver sustained alignment and provide a 70,000-hour service life rating at 40°C.
- Integrated Motor Safeguards: Features locked-rotor impedance protection preventing thermal hazards for up to 96 hours alongside reverse polarity protection.
- Flame-Retardant PBT Construction: Molded with industrial UL 94V-0 reinforced thermoplastic across both frame and impeller for enhanced safety.
- Acoustically Optimized Profile: Produces a balanced 43.79 CFM airflow at a subdued 30.0 dB(A) sound level in free-air operation.
- Standard Panel Integration: Features symmetrical 82.5 mm mounting hole centers and a compact 25.4 mm housing depth for universal fitment.
Technical Specifications
| Manufacturer | Delta |
|---|---|
| Manufacturer Part Number (MPN) | AFB0924M |
| Product Series | AFB Series |
| Product Category | DC Axial Fans |
| Fan / Component Type | Tubeaxial Cooling Fan |
| Motor Topology | Brushless DC, 2-Phase, 4-Pole |
| Rated Voltage | 24 VDC |
| Operating Voltage Range | 14.0 to 27.6 VDC |
| Rated Current | 0.08 A |
| Max. Current Draw | 0.12 A |
| Rated Input Power | 1.92 W |
| Nominal Speed (RPM) | 2450 RPM |
| Max. Airflow | 43.79 CFM (74.4 m³/h / 1.240 m³/min) |
| Min. Airflow Specification | 39.55 CFM (67.2 m³/h / 1.120 m³/min) |
| Max. Static Pressure | 0.130 in H₂O (31.9 Pa / 3.25 mmH₂O) |
| Min. Static Pressure Specification | 0.119 in H₂O (29.7 Pa / 3.03 mmH₂O) |
| Acoustic Noise Level | 30.0 dB(A) |
| Frame Dimensions (L × H) | 92.0 × 92.0 mm (3.622 × 3.622 in) |
| Housing Thickness / Depth | 25.4 mm (1.000 in) |
| Mounting Hole Pitch | 82.5 × 82.5 mm (3.248 × 3.248 in) |
| Mounting Hole Diameter | 8 × Ø 4.5 ± 0.3 mm (8 × Ø 0.177 in) |
| Frame Material | Plastic (UL 94V-0 PBT) |
| Impeller Material | Plastic (UL 94V-0 PBT) |
| Bearing System | Two Ball Bearings |
| Direction of Rotation | Clockwise (viewed from nameplate side) |
| Weight | 99 g (0.218 lbs) |
| Termination Type | 2 Lead Wires |
| Lead Wire Specification | UL 1007 AWG #24 |
| Lead Wire Length | 305.0 ± 10.0 mm (12.008 ± 0.394 in) |
| Lead Wire Pinout | Red: Positive (+), Black: Negative (-) |
| Motor Protection | Locked Rotor Protection (96 hrs impedance) & Overcurrent Shutdown |
| Polarity Protection | Reverse Polarity Protected |
| Insulation Resistance | 10 MΩ min. at 500 VDC (between frame and positive terminal) |
| Dielectric Strength | 5 mA max. at 500 VAC 60 Hz for 1 minute (between frame and positive terminal) |
| 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 | 3 to 90% RH (non-condensing) |
| Storage Humidity Range | 5 to 95% RH (non-condensing) |
| Service Life (L10 Expectancy) | 70,000 Hours continuous operation at 40 °C (15 to 65% RH) |
| Vibration Resistance | 3.2 gRMS overall (10 to 1000 Hz, 2 hrs per X, Y, Z axis) |
| Mechanical Shock Resistance | 20 G min. (11 ms half-sine wave, 5 shocks per direction) |
| Certifications & Approvals | UL, CSA, VDE, CE |
| Environmental Compliance | RoHS3 Compliant (Free of PBBs, PBBOs, CFCs, PBBEs, PBDPEs, HCFCs) |
Applications
Delta AFB0924M axial cooling fans provide primary chassis heat evacuation across automated manufacturing equipment, telecom rectifiers, and industrial programmable logic controller (PLC) cabinets. The standardized 92 mm envelope integrates directly into motor variable frequency drives, CNC servo enclosures, and uninterruptible power supply (UPS) inverter banks requiring continuous, low-vibration forced-air cooling. Field engineers and OEM designers deploy this model for maintenance overhauls and new equipment builds within factory automation racks and instrumentation enclosures.
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