Description
The Delta ASB0305MA-DR00 (also known as ASB0305MADR00) is a compact, high-precision DC brushless tubeaxial cooling fan engineered in a square 30 x 30 x 10 mm (1.18 x 1.18 x 0.39 in) form factor. Designed for space-constrained low-voltage electronics, it delivers an aerodynamic output of 3.72 CFM (6.3 m³/h) and a maximum static pressure of 0.167 in H₂O (41.7 Pa) at a rated speed of 9000 RPM while consuming just 0.55 W at 5.0 VDC. Construction features durable UL 94V-0 flame-retardant thermoplastic for both the frame and impeller, paired with an optimized sleeve bearing system and counterclockwise rotation. Electrical integration is facilitated through three 150 mm UL 1061 AWG #28 lead wires incorporating an open-collector Locked Rotor / Rotation Detect (RD) signal, impedance protection against locked rotor burnout, and reverse polarity safeguarding.
Key Features
- Ultra-Compact Micro Profile: Standard 30x30x10 mm housing enables drop-in thermal integration into dense embedded computing enclosures.
- Rotation Detect Lock Signal: Open-collector RD lead triggers immediate host monitoring alarms upon rotor stoppage or obstruction.
- Impedance Burnout Protection: Engineered motor winding impedance prevents fire and thermal damage during 96-hour locked rotor conditions.
- Flame-Retardant Thermoplastic: High-grade UL 94V-0 rated plastic frame and impeller satisfy stringent electronic flammability standards.
- Low-Power Acoustic Balance: Delivers 3.72 CFM airflow at 0.55 W nominal power with a quiet 23.0 dB(A) acoustic profile.
Technical Specifications
| Manufacturer | Delta |
|---|---|
| Manufacturer Part Number (MPN) | ASB0305MA-DR00 |
| Alternate Part Number | ASB0305MADR00 |
| Delta Safety Model Number | ASB0305MA-D |
| Product Series | ASB Series |
| Product Category | DC Axial Fans |
| Fan / Component Type | DC Brushless Tubeaxial Fan |
| Phase & Supply Type | Single-Phase DC |
| Rated Voltage | 5.0 VDC |
| Operating Voltage Range | 4.5 to 5.5 VDC |
| Min. Starting Voltage | 4.0 VDC |
| Rated Input Current | 0.11 A |
| Max. Current Draw | 0.19 A |
| Safety Current on Label | 0.19 A |
| Rated Input Power | 0.55 W |
| Max. Input Power | 0.95 W |
| Nominal Speed (RPM) | 9000 RPM (±15%) |
| Airflow | 3.72 CFM (6.3 m³/h / 0.105 m³/min) |
| Min. Airflow (Limited Spec) | 3.05 CFM (5.18 m³/h / 0.086 m³/min) |
| Static Pressure | 0.167 in H₂O (41.7 Pa / 4.25 mmH₂O) |
| Min. Static Pressure (Limited Spec) | 0.112 in H₂O (28.0 Pa / 2.86 mmH₂O) |
| Acoustical Noise Level | 23.0 dB(A) |
| Max. Acoustical Noise Level | 27.5 dB(A) |
| Acoustic Test Condition | Anechoic chamber at 1.0 m intake distance |
| Airflow Direction | Axial intake over struts |
| Direction of Rotation | Counterclockwise (CCW) viewed from front of airflow inlet |
| Dimensions (L × H × D) | 30.0 × 30.0 × 10.0 mm (1.181 × 1.181 × 0.394 in) |
| Mounting Hole Pitch | 24.0 ± 0.3 mm (0.945 ± 0.012 in) |
| Mounting Hole Diameter | 4 × Ø3.2 ± 0.3 mm (4 × Ø0.126 in) |
| Corner Flange Thickness | 2.0 ± 0.3 mm (0.079 in) |
| Frame Construction | Plastic UL 94V-0 |
| Impeller Construction | Plastic UL 94V-0 |
| Bearing System | Sleeve Bearing |
| Weight | 7.4 g (0.016 lbs) |
| Termination & Cable Specs | 3 Lead Wires, UL 1061 AWG #28 |
| Cable Harness Length | 150.0 ± 10.0 mm (5.906 ± 0.394 in) |
| Wire Strip & Tin Length | Stripped 2.0 ± 0.5 mm, Pre-tinned 10.0 mm |
| Wiring Pinout / Connection | Red: Positive (+), Black: Negative (-), Blue: Locked Rotor / RD Signal (-R00) |
| Control / Signal Features | Rotation Detect (RD) Locked Rotor Signal, Open Collector Mode |
| RD Output Circuit VCE Saturation | 0.5 VDC Max. |
| RD Collector Voltage (VGD) | 5.5 VDC Max. |
| RD Collector Current (Ic) | 5 mA Max. |
| Motor Protection | Locked Rotor Protection (Impedance Protected up to 96 Hours) |
| Reverse Polarity Protection | Continuous reverse connection withstand |
| Insulation Class | UL Class A |
| Insulation Resistance | ≥ 10 MΩ at 500 VDC (between frame and (+) terminal) |
| Dielectric Strength | 5 mA Max at 500 VAC 50/60 Hz 1 minute (between frame and (+) terminal) |
| External Cover Construction | Open Type |
| 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 | 0% to 95% RH (Non-condensing) |
| Service Life (L10 Expectancy) | 20,000 Hours continuous operation at 40°C, 65% RH |
| Ozone Depleting Substances Compliance | Zero content of PBBs, PBBOs, CFCs, PBBEs, PBDPEs, HCFCs |
| Production Locations | China / Thailand |
| Agency Approvals & Compliance | cURus, TUV, RoHS Compliant (RoHS3) |
Applications
The Delta ASB0305MA-DR00 DC axial fan is engineered specifically for active localized spot-cooling in ultra-compact electronics and low-voltage industrial hardware. It commonly dissipates thermal loads across single-board computers (SBCs), embedded IoT gateways, miniature network switches, and optical transceiver modules. Additionally, it serves as a critical MRO replacement component within handheld diagnostic instruments, point-of-sale terminals, and micro automation controller enclosures.
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