Description
The Delta ASB0312MA-DR00 (also known as ASB0312MADR00) is a high-precision, ultra-compact brushless DC tubeaxial cooling fan measuring 30.0 × 30.0 × 10.0 mm (1.181 × 1.181 × 0.394 in). Operating at a nominal 12 VDC supply, it runs at 9000 RPM delivering an airflow of 3.72 CFM (6.32 m³/h) and static pressure of 0.167 in H₂O (41.68 Pa) with an acoustical emission of only 23.0 dB(A). Built with UL 94V-0 flame-retardant thermoplastic for both the frame and impeller, this unit incorporates an integrated sleeve bearing system and an open-collector rotation detect (RD) locked-rotor alarm circuit. Electrical connection is established via 150 mm UL 1061 AWG #28 lead wires with reverse polarity and 96-hour locked rotor impedance protection.
Key Features
- Compact Form Factor: Micro 30x30x10 mm frame engineered for densely packed electronic enclosures.
- Integrated Alarm Output: Features open-collector RD rotation detect signal for immediate system stoppage alerts.
- Rugged Safety Engineering: 96-hour locked rotor impedance protection and comprehensive polarity protection prevent motor damage.
- Flame-Retardant Construction: UL 94V-0 rated thermoplastic housing and impeller ensure compliance with industrial flammability standards.
- Acoustically Optimized Profile: Delivers 3.72 CFM airflow while maintaining low noise output of 23.0 dB(A).
Technical Specifications
| Manufacturer | Delta |
|---|---|
| Manufacturer Part Number (MPN) | ASB0312MA-DR00 |
| Alternate Part Number | ASB0312MADR00 |
| Product Series | ASB Series |
| Product Category | DC Axial Fans |
| Fan / Component Type | Tubeaxial Cooling Fan |
| Phase & Supply Type | DC Brushless |
| Rated Voltage | 12 VDC |
| Operating Voltage Range | 7.0 to 13.2 VDC |
| Min. Starting Voltage | 7.0 VDC |
| Rated Current | 0.06 A |
| Max. Current Draw | 0.12 A |
| Safety Current on Label | 0.12 A |
| Power Rating | 0.72 W |
| Max. Input Power | 1.44 W |
| Speed (RPM) | 9000 ±15% RPM |
| Airflow | 3.72 CFM (6.32 m³/h / 0.105 m³/min) |
| Min. Airflow Output | 3.16 CFM (5.37 m³/h / 0.089 m³/min) |
| Static Pressure | 0.167 in H₂O (41.68 Pa / 4.25 mmH₂O) |
| Min. Static Pressure | 0.120 in H₂O (30.11 Pa / 3.07 mmH₂O) |
| Noise Level | 23.0 dB(A) (Max. 27.5 dB(A)) |
| Airflow Direction | Intake over struts |
| 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 in) |
| Mounting Hole Diameter | 4 × Ø 3.2 ± 0.3 mm (0.126 in) |
| Housing Material | Plastic (UL 94V-0) |
| Impeller Material | Plastic (UL 94V-0) |
| External Cover | Open Type |
| Bearing Type | Sleeve Bearing |
| Direction of Rotation | Counterclockwise (viewed from front air flow inlet) |
| Weight | 7.4 g (0.016 lbs / 0.26 oz) |
| Termination & Cable Specs | 3 Wire Leads, UL 1061 AWG #28, Length: 150.0 ± 10.0 mm (5.906 in) |
| Wiring Pinout / Connection | Red: Positive (+), Black: Negative (-), Blue: Lock Signal / RD (-R00) |
| Control / Signal Features | Rotation Detect (RD) Locked Rotor Alarm Signal (Open Collector) |
| RD Output Circuit Vce (sat) | 0.5 V Max. |
| RD Collector Voltage (Vce) | 13.2 VDC Max. |
| RD Collector Current (Ic) | 5 mA Max. |
| Motor Protection | Impedance Protected (96 Hours Locked Rotor Resistance), 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 to +70 °C (14 to 158 °F) |
| Storage Temperature | -40 to +75 °C (-40 to 167 °F) |
| Operating Humidity Range | 5% to 90% RH |
| Storage Humidity Range | 5% to 95% RH |
| Service Life (L10) | 20,000 Hours continuous operation at 40°C, 65% RH |
| Environmental Standards | RoHS Compliant, Free of PBBs, PBBOs, CFCs, PBBEs, PBDPEs, HCFCs |
| Certifications | cURus, TUV, CE |
Applications
Delta ASB0312MA-DR00 DC axial fans are tailored for compact cooling in 1U networking hardware, optical transceivers, network switches, and embedded single-board computers. Their small form factor and integrated locked-rotor alarm make them an ideal thermal management component for medical diagnostic monitors, laboratory analyzers, and compact telecom rectifiers. They are widely utilized by OEMs and MRO service technicians for cooling high-density micro-electronics and instrumentation power supplies.
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