Description
The Sunon EF50151B1-1B00U-A99 (also known as EF50151B11B00UA99) is a compact, high-pressure DC centrifugal blower with a specialized scroll housing measuring 51.7 x 51.6 x 15.0 mm (2.04 x 2.03 x 0.59 in). Driven by an efficient 4-pole brushless DC motor on a precision dual ball bearing system, this unit delivers an airflow of 4.5 CFM (7.65 m³/h) and a peak static back pressure of 0.67 in H₂O (166.9 Pa) at 5200 RPM. Built from flame-retardant UL 94V-0 thermoplastic PBT, the blower integrates automatic locked-rotor recovery and polarity protection to ensure reliable continuous operation in tightly packed electronic enclosures.
Key Features
- High-Static Blower Design: Generates 0.67 in H₂O (166.9 Pa) pressure to effectively overcome dense microchannel heat sink impedances.
- Dual Ball Bearing System: Engineered for continuous duty with an extended service life rating of 70,000 hours at 40°C.
- UL 94V-0 Rated Housing: Precision-molded PBT thermoplastic scroll housing and impeller ensure superior flame-retardant structural integrity.
- Auto-Restart Protection: Shuts down current during rotor stall events and safely restarts rotation automatically within 10 seconds.
- Low-Power Brushless Motor: Efficient single-phase 4-pole motor design draws only 1.28 W nominal at 12 VDC supply.
Technical Specifications
| Manufacturer | Sunon |
|---|---|
| Manufacturer Part Number (MPN) | EF50151B1-1B00U-A99 |
| Alternate Part Number | EF50151B11B00UA99 |
| Product Series | EF Series (High-Performance Blower) |
| Specification Number | D05060910G-01 |
| Engineering Specification | E11500492 |
| Product Category | DC Blower Fans |
| Fan / Component Type | Centrifugal Scroll Blower Fan |
| Motor Design | Single-phase, 4-poles Brushless DC Motor |
| Phase & Supply Type | Single-Phase DC |
| Rated Voltage | 12 VDC |
| Operating Voltage Range | 4.5 to 13.8 VDC |
| Min. Starting Voltage | 4.5 VDC (at 25°C Power On/Off) |
| Rated Current | 106 mA (0.106 A) |
| Max. Current Draw | 122 mA (0.122 A) |
| Rated Power Consumption | 1.28 W |
| Max. Power Consumption | 1.47 W |
| Safety Power Consumption | 1.50 W |
| Rated Speed (RPM) | 5200 RPM ± 15% |
| Airflow | 4.5 CFM (7.65 m³/h / 0.127 m³/min) |
| Static Pressure | 0.67 in H₂O (166.9 Pa / 17.0 mmH₂O) |
| Noise Level | 41.0 dB(A) (1 m from fan intake) |
| Dimensions (L × H × D) | 51.7 × 51.6 × 15.0 mm (2.04 × 2.03 × 0.59 in) |
| Mounting Hole Configuration | 2 holes, Ø 4.5 mm |
| Housing Material | Thermoplastic PBT (UL 94V-0) |
| Impeller Material | Thermoplastic PBT (UL 94V-0) |
| Bearing Type | Precision Dual Ball Bearing System |
| Direction of Rotation | Counter-Clockwise (viewed from front of fan blade) |
| Weight | 31 g (0.068 lbs / 1.09 oz) |
| Termination & Cable Specs | 2 Lead Wires, UL 1007 AWG 26 |
| Wiring Pinout / Connection | Red Wire: VDC (+), Black Wire: GND (-) |
| Motor Protection | Automatic Restart (shut down on lock, restart in 10s) & Polarity Protection |
| Insulation Class | UL Class A |
| Insulation Resistance | 10 MΩ Min. at 500 VDC (between internal stator and lead wire +) |
| Dielectric Strength | 500 VAC for 1 min / 600 VAC for 2 sec (between housing and lead wire +) |
| Operating Temperature | -10°C to +70°C (14°F to 158°F) |
| Storage Temperature | -40°C to +80°C (-40°F to 176°F) |
| Operating / Storage Humidity | 65% to 95% RH |
| Service Life (L10) | 70,000 Hours (at 40°C, 65% RH, 90% confidence level) |
| Standards & Compliance | UL Recognized (E77551), CUR (E77551), TUV, CE, UKCA, RoHS Directive 2011/65/EU |
Applications
The Sunon EF50151B1-1B00U-A99 DC blower fan delivers high-static pressure cooling in compact electronic assemblies and localized thermal extraction ducts. It is commonly deployed in 3D printer hotends, portable medical oxygen concentrators, automated laboratory diagnostic instruments, and embedded micro-chassis computing modules. In MRO and OEM retrofits, this unit provides reliable forced-air cooling across dense heatsinks in projection displays, barcode scanners, and handheld analytical field equipment.
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