Description
Delta AFB0424MB is a compact, high-reliability brushless DC axial cooling fan engineered in a standard 40 x 40 x 15 mm (1.575 x 1.575 x 0.591 in) footprint for space-constrained industrial systems. Powered by a two-phase, four-pole motor running on 24 VDC, it delivers an airflow rating of 8.12 CFM (13.8 m³/h) and a peak static pressure of 0.202 in H₂O (50.3 Pa) at 6000 RPM while drawing only 1.44 W nominal. The unit is constructed with flame-retardant UL 94V-0 plastic housing and impeller, supported by precision dual ball bearings rated for 70,000 hours of continuous operation. Integrated impedance locked rotor and reverse polarity protections safeguard against thermal failures, with electrical connection made via durable 340 mm UL 1007 AWG #24 lead wires.
Key Features
- Dual Ball Bearings: Heavy-duty dual ball bearing system delivers an extended 70,000-hour service life at 40°C ambient.
- High-Static Aerodynamics: Custom 40mm impeller geometry generates 0.202 in H₂O static pressure for dense thermal resistance.
- UL 94V-0 Fire-Retardant Build: Robust frame and impeller molded from flame-resistant thermoplastic withstand harsh operating temperatures.
- Motor Safety Protection: Built-in impedance locked rotor protection and polarity safety shield the internal circuitry from wiring faults.
- Long Extended Leads: Pre-stripped 340 mm UL 1007 AWG #24 wires provide flexible routing within tight enclosures.
Technical Specifications
| Manufacturer | Delta |
|---|---|
| Manufacturer Part Number (MPN) | AFB0424MB |
| Product Series | AFB |
| Product Category | DC Axial Fans |
| Fan / Component Type | Brushless DC Tubeaxial Fan |
| Motor Architecture | 2-Phase, 4-Pole Brushless DC |
| Rated Voltage | 24 VDC |
| Operating Voltage Range | 14.0 to 27.6 VDC |
| Nominal Input Power | 1.44 W |
| Max. Input Power | 2.16 W |
| Rated Current | 0.06 A |
| Max. Current Draw | 0.09 A |
| Speed (RPM) | 6000 RPM |
| Airflow | 8.12 CFM (13.80 m³/h / 0.230 m³/min) |
| Min. Airflow (Rated) | 7.42 CFM (12.60 m³/h / 0.210 m³/min) |
| Static Pressure | 0.202 in H₂O (50.3 Pa / 5.12 mmH₂O) |
| Min. Static Pressure (Rated) | 0.160 in H₂O (40.7 Pa / 4.15 mmH₂O) |
| Noise Level | 24.5 dB(A) |
| Max. Noise Level | 29.5 dB(A) |
| Dimensions (L × H × D) | 40.0 × 40.0 × 15.0 mm (1.575 × 1.575 × 0.591 in) |
| Mounting Hole Pitch | 32.0 × 32.0 mm (1.260 × 1.260 in) |
| Mounting Hole Diameter | 4 × Ø 3.5 mm (0.138 in) |
| Housing Material | Plastic (UL 94V-0) |
| Impeller Material | Plastic (UL 94V-0) |
| Bearing Type | Two Ball Bearings |
| Direction of Rotation | Clockwise (viewed from nameplate side) |
| External Cover | Open Type |
| Termination & Cable Specs | 2 Lead Wires, UL 1007 AWG #24, Length 340.0 mm (13.386 in) |
| Wiring Pinout / Connection | Red (+) Positive, Black (-) Negative |
| Motor Protection | Impedance Protected (96 hours locked rotor), Reverse Polarity Protection |
| Insulation Type | UL: Class A |
| Insulation Resistance | ≥ 10 MΩ at 500 VDC (between frame and (+) terminal) |
| Dielectric Strength | 5 mA Max at 500 VAC 60 Hz for 1 minute (between frame and (+) terminal) |
| Operating Temperature | -10 °C to +70 °C (14 °F to 158 °F) |
| Storage Temperature | -40 °C to +75 °C (-40 °F to 167 °F) |
| Operating Humidity | 4% to 90% RH |
| Storage Humidity | 5% to 95% RH |
| Service Life (L10) | 70,000 Hours Continuous Operation at 40 °C (15% to 65% RH) |
| Vibration Tolerance | Overall 3.2 gRMS, 10–1000 Hz, 2 Hours per X, Y, Z axis |
| Mechanical Shock Tolerance | 20 G Min., 11 ms Half-Sine Wave, 5 Shocks per direction |
| Weight | 0.025 kg (0.055 lbs / 25.0 g) |
| Standards & Compliance | CE, CSA, UL, VDE, RoHS Compliant, Zero ODS |
Applications
Delta AFB0424MB is widely deployed for localized spot cooling within 1U/2U telecommunications racks, optical transceivers, network routing switches, and industrial PoE gateways. It provides reliable airflow distribution across power conversion modules, embedded single-board computers (SBCs), PLC processor enclosures, and laboratory diagnostic analyzers. Its rugged mechanical design makes it an ideal drop-in replacement for maintenance and repair operations in automated packaging controls, factory instrumentation, and commercial printing chassis.
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