EN
FB3G250-24PL-20
| Nominal Voltage | VDC | 24 |
| Current draw | A | 12.3±10% |
| Speed(RPM) | min-1 | 3100±5% |
| Power consumption | W | 295.2±10% |
| Max. Air Flow | m3/h | 1480.9 |
| Max. Static Pressure | Pa | 901 |
50pcs
The FB3G250-24PL-20 is a 24VDC high-power DC backward centrifugal fan featuring the BLDC102 motor — the most powerful 24V configuration in the 250mm FANOVA series. It delivers an exceptional 901 Pa static pressure at 1480.9 m³/h, making it the definitive choice for high-resistance ducted systems, HEPA filtration banks, and industrial extraction where substantial back pressure must be overcome from low-voltage DC power. Operating at 3100 RPM with 295W input, the BLDC102 brushless motor achieves this performance while drawing 12.3A across a 16-28 VDC range, enabling operation from high-capacity battery banks and industrial DC bus systems. The integrated FG tach output provides real-time speed feedback for precision closed-loop control, compatible with 0-10VDC analog and PWM digital control signals for seamless automation integration. Despite its power, it maintains a moderate 67 dB(A) sound level through optimized impeller aerodynamics. With IP44-rated ingress protection, Class B insulation to 130°C, and a 50,000-hour L10 service life, this fan is engineered for continuous industrial duty. Ideal applications include industrial fume extraction, cleanroom pressurization, HEPA filtration units, paint booth ventilation, and any application demanding maximum static pressure from a 24VDC platform. CE and RoHS certified.
At the heart of the FB3G250-24PL-20 is the BLDC102 external rotor brushless DC motor — a step up from the BLDC92 series delivering 295W output — driving a backward curved centrifugal impeller with a 250mm diameter, optimized for high-pressure operation at 3100 RPM. The aerodynamic design achieves 75-80% efficiency, converting 295W of DC power into 1480.9 m³/h against 901 Pa — delivering industrial-grade static pressure that competes with 310VDC and 3-phase AC systems from a standard 24V battery bank. Operating across a 16-28 VDC range at 12.3A, the BLDC102 maintains stable performance through battery discharge cycles in off-grid and mobile DC installations. The comprehensive control interface accepts 0-10VDC analog signals and PWM (1-10kHz) digital inputs for stepless speed regulation, while the FG tachometer output provides real-time RPM feedback for closed-loop integration with PLCs, microcontrollers, and building management systems. Built-in protection features include soft-start, current limiting, locked-rotor protection, over-temperature protection, and reverse polarity protection on the DC input. The fan construction features a die-cast aluminum housing with IP44-rated sealing, high-speed ball bearings supporting any mounting orientation, and Class B electrical insulation for safe operation at ambient temperatures up to 130°C. Rated for 50,000 hours L10 lifespan at 40°C with minimal maintenance, this fan is built for the most demanding high-pressure low-voltage DC ventilation applications where power and reliability are paramount.
| DC Backward Centrifugal Fan |  |
|
| Type | FB3G250-24PL-20 | |
| Model | BLDC102 | |
| Nominal Voltage | VDC | 24 |
| Voltage Range | VDC | 16~28 |
| Current Draw | A | 12.3±10% |
| Speed | RPM | 3100±5% |
| Power Consumption | W | 295.2±10% |
| Sound Pressure Level | dB(A) | 67±5% |
| Max. Air Flow | m³/h | 1480.9 |
| Max. Static Pressure | Pa | 901 |
| Insulation Class | - | Class B |
| Degree of Protection | - | IP44 |
| Control Input | - | 0~10VDC / PWM |
| Signal Output | - | FG (Tach output) |
Remarks:
I. Standard lead wire length is 300mm; customized length available upon request.
II. Control via 0-10VDC analog signal or PWM digital signal.
Test condition:
I. Measurement performed according to ISO 5801, using double chamber method.
II. Test voltage: 24VDC, ambient temperature: 23±2°C, relative humidity: 50±10%.
III. Noise measured at 1m distance in anechoic chamber per ISO 3744.
IV. PQ curve shows performance across 0-100% duty cycle at rated voltage.
I. When taking out the fan, do not directly lift the fan lead wire. If the lead wire is excessively stressed, the internal welding part may fall off
II. Do not plug or unplug the fan lead plug when the fan is running
III. If the fan does not work after starting, do not touch the impeller, rotor, or other parts, professional technical personnel are required to inspect the fan to prevent sudden start of the fan from causing hand or other personal injury
IV. Because of the soft start characteristics of the fan, to prevent personal injury, do not touch the impeller or other parts of the fan during powered on or running at low speeds
V. The fan needs to be operated and used under the guidance of professional personnel to prevent children from coming into touch this product
VI. If the power line is worn or damaged, it needs to be returned to the manufacturer for repair or be replaced under the guidance of the manufacturer
VII. As a part of the fan, it is not recommended to use the motor alone when there is no impeller or loading
1. Maximum Static Pressure with BLDC102 Power: The FB3G250-24PL-20 achieves an industry-leading 901 Pa at 1480.9 m³/h from only 24VDC — powered by the BLDC102 motor delivering 295W — the highest pressure rating in the 250mm FANOVA DC fan series. This enables single-fan solutions for HEPA filtration, industrial extraction, and cleanroom pressurization.
2. BLDC102 Motor Platform: The BLDC102 external rotor motor represents a significant power upgrade over standard BLDC92 configurations, delivering 295W at 3100 RPM — achieving 75-80% aerodynamic efficiency and 30-40% energy savings versus 3-phase AC fans while operating from standard 24V battery banks.
3. Wide Application Range: Ideal for industrial fume extraction with long duct runs, HEPA filtration banks, paint booth ventilation, cleanroom HVAC, and telecom shelter pressurization. Available for OEM/ODM customization.
4. Built for Continuous Industrial Duty: Die-cast aluminum IP44 housing, high-speed ball bearings, over-temperature protection, and 50,000-hour L10 lifespan at 40°C ensure reliability in 24/7 operation. EC brushless technology reduces energy consumption by 30%+ versus AC.
5. Precision Control & Integration: 0-10VDC/PWM plus FG tach feedback for PLC/BMS closed-loop control. Standard 250mm flange, any-orientation mounting, and maintenance-free BLDC design.
Q1: What kind of payments do you support?
A1: For sample order, 100% payment in advance; For batch order, 30% in advance and 70% will be paid before shipping
Q2: Will you provide samples?
A2: Sample is available and can be delivered within 7 days for standard models
Q3: How can I choose a more suitable model?
A3: We need the information like fan type, quantity, size, material, voltage, air flow and static pressure.
Q4: How can I place the order?
A4: Usually quote you within 24 hours after we get your inquiry. First sign the PI, pay deposit, then we will arrange the production. After finished production need you pay balance. Finally we will ship the Goods.
Q5: About transportation
A5: All available shipping ways could be applied, express shipping, air or sea. Appointed shipping company or our own forwarders all could be used in shipment. Full-way tracking the cargos for you before the goods arrive.
Q6: How long is the warranty period?
A6: We currently offer 3-year quality guarantee for our own products, and in response to current product problems, our company provides line support, and some customers have been able to improve their products.
