Description
Delta BFB0524HH is a compact, high-pressure DC centrifugal scroll blower engineered with an integrated two-phase, four-pole brushless motor within a 51.0 × 51.3 × 15.0 mm (2.01 × 2.02 × 0.59 in) form factor. Operating on a nominal 24 VDC bus across a 14.0 to 27.6 VDC input envelope, this unit delivers up to 4.59 CFM (7.80 m³/h) of targeted forced-air displacement and achieves a maximum static pressure head of 0.866 in H₂O (215.7 Pa) at 6500 RPM. Built with flame-retardant UL 94V-0 plastic housing and impeller assemblies supported by precision dual ball bearings, it ensures an L10 service life of 50,000 hours at 40 °C. The blower incorporates integrated locked-rotor current shutdown, reverse polarity protection, and connection via UL 1061 AWG #26 lead wires.
Key Features
- High-Static Scroll Design: Engineered scroll geometry delivers 0.866 in H₂O static head through compact ducted discharge.
- Dual Ball Bearing Assembly: Precision dual ball system guarantees 50,000 hours continuous operation at 40 °C ambient.
- UL 94V-0 Flame Retardance: Molded thermoplastic frame and impeller meet strict flame resistance standards for industrial electronics.
- Rotor Shutdown Protection: Motor winding impedance and automatic shutoff protect electronics against burnout during rotor lock.
- Broad Input Tolerance: Operates reliably across wide 14.0 to 27.6 VDC supply fluctuations without thermal degradation.
Technical Specifications
| Manufacturer | Delta |
|---|---|
| Manufacturer Part Number (MPN) | BFB0524HH |
| Product Series | BFB Series |
| Product Category | DC Blower Fans |
| Fan / Component Type | DC Brushless Centrifugal Blower with Scroll Housing |
| Motor Architecture | Brushless DC Motor (2-Phase, 4-Pole) |
| Rated Voltage | 24 VDC |
| Operating Voltage Range | 14.0 to 27.6 VDC |
| Rated Current | 0.11 A |
| Max. Current Draw | 0.16 A |
| Nominal Input Power | 2.64 W |
| Max. Input Power | 3.84 W |
| Rated Speed | 6500 RPM (Ref.) |
| Max. Airflow (Zero Static Pressure) | 4.59 CFM (0.130 m³/min / 7.80 m³/h) |
| Min. Airflow Performance | 3.35 CFM (0.095 m³/min / 5.69 m³/h) |
| Max. Static Pressure (Zero Airflow) | 0.866 in H₂O (22.00 mmH₂O / 215.7 Pa) |
| Min. Static Pressure Performance | 0.619 in H₂O (15.72 mmH₂O / 154.2 Pa) |
| Acoustical Noise Level (Average) | 45.0 dB(A) |
| Max. Acoustical Noise Level | 48.0 dB(A) |
| Direction of Rotation | Clockwise (viewed from nameplate side) |
| Bearing System | Two Ball Bearings |
| Housing / Frame Material | Plastic (UL 94V-0) |
| Impeller Material | Plastic (UL 94V-0) |
| External Cover | Open Type |
| Overall Dimensions (W × H × D) | 51.0 × 51.3 × 15.0 mm (2.008 × 2.020 × 0.591 in) |
| Air Intake Diameter | Ø 31.0 mm (Ø 1.220 in) |
| Air Discharge Outlet Dimensions | 20.0 × 12.2 mm (0.787 × 0.480 in) |
| Mounting Hole Configuration | 2 × Ø 4.5 mm (Ø 0.177 in) |
| Mounting Hole Pitch | 18.0 mm (0.709 in) |
| Weight | 28 ± 5 g (0.062 lbs) |
| Termination & Cable Specs | 2 Wire Leads, UL 1061 AWG #26 |
| Wiring Pinout / Connection | Red Wire: Positive (+), Black Wire: Negative (-) |
| Motor Protection | Locked Rotor Protection (impedance protected up to 96 hours at rated voltage, automatic current shutdown) & Reverse Polarity 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 | -10 °C to +70 °C (14 °F to 158 °F) |
| Storage Temperature | -40 °C to +75 °C (-40 °F to 167 °F) |
| Operating Humidity Range | 3 to 90 % RH |
| Storage Humidity Range | 0 to 95 % RH |
| Service Life (L10 Expectancy) | 50,000 Hours continuous operation at 40 °C (15 to 65 % RH) |
| Vibration Resistance | 3.2 gRMS overall, 10–1000 Hz, 2 hours per axis (X, Y, Z) |
| Mechanical Shock Resistance | 20 G min., 11 ms half-sine wave, 5 shocks per direction |
| Environmental & Safety Compliance | RoHS Compliant, Lead-Free, UL, CSA, VDE, CE |
Applications
Delta BFB0524HH centrifugal blowers provide focused spot-cooling in space-confined industrial electronics such as embedded computing chassis, telecommunications rectifiers, and automation power supplies. The perpendicular scroll discharge excels in ducted micro-plenums, 3D printer hotend extruders, medical laboratory diagnostic instruments, and commercial barcode scanning stations. OEM engineering teams integrate this model into high-density instrumentation enclosures where targeted airflow must overcome dense internal heat sinks and restrictive component layouts.
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