EN
FB3G355-48PK-20
| Nominal Voltage | VDC | 48 |
| Current draw | A | 6.0±10% |
| Speed(RPM) | min-1 | 1700±5% |
| Power consumption | W | 288±10% |
| Max. Air Flow | CFM / m3 /H | 2609.8/4434.6 |
| Max. Static Pressure | In.wg /Pa | 2.27/568 |
10pcs
This 48V DC backward curved centrifugal fan is engineered for high-volume air movement, delivering up to 2609.8 CFM (4434.6 m3/h) to replace multiple smaller fans in a single, compact unit. The FB3G355-48PK-20 combines a 355 mm glass-fiber reinforced polypropylene impeller with a die-cast aluminum housing, achieving a lightweight yet robust construction that resists chemical corrosion. Driven by a high-efficiency BLDCDC102 brushless DC motor, it consumes only 288 W at 1700 RPM, making it a low-energy solution for continuous-duty applications. The wide input voltage range of 36-57 VDC aligns with standard telecom DC power plants, enabling seamless integration into DCIM-managed systems. With a maximum static pressure of 2.27 in.wg (568 Pa), this fan overcomes duct resistance in server rooms, telecom shelters, and industrial cabinets. Its acoustic output of 72.1 dB(A) is reasonable for heavy airflow, and the motor features PWM speed control for precise airflow modulation. Protected with IP54-rated housing and class B insulation, it ensures reliable operation in demanding environments, backed by dual ball bearings rated for 50,000 hours at 40°C. Certifications include CE and RoHS, making it a compliant choice for global OEM projects. Whether for new energy ventilation or HVAC upgrades, this FANOVA model delivers high performance with a low total cost of ownership.
The FB3G355-48PK-20 is a backward curved centrifugal fan designed for demanding high-volume ventilation and cooling tasks, where a single unit can replace a bank of smaller fans, reducing installation complexity and energy use. The impeller is molded from glass-fiber reinforced polypropylene (PP+GF), offering an excellent strength-to-weight ratio, chemical resistance, and dimensional stability, even in humid or corrosive atmospheres. With a 355 mm impeller diameter and 12 backward-swept blades, the fan achieves a peak airflow of 2609.8 CFM (4434.6 m3/h) at free delivery and a maximum static pressure of 2.27 in.wg (568 Pa) at shutoff, making it suitable for systems with moderate ductwork or filter resistance. The housing and endcaps are precision die-cast from aluminum alloy, ensuring rigidity, heat dissipation, and protection against environmental contaminants. The core of the fan is the BLDCDC102 brushless DC motor, a sensorless design with a rotor diameter of 102 mm, which delivers 288 W of shaft power at the rated speed of 1700 RPM. The motor accepts a nominal 48 VDC input (operating range 36-57 VDC) and draws 6.0 A at full load, with an efficiency exceeding 85% at the best point. Speed control is achieved via a 0-10 VDC analog signal or PWM (duty cycle 10-100%), allowing precise airflow matching to system demand. The fan is equipped with a 20 AWG lead cable of 183 mm length, terminated with bare wires for flexible connection to control systems. Protection features include auto-restart, reverse polarity, and overcurrent protection, while the motor windings are insulated to Class B (130°C) and the unit is rated IP54 for dust and water spray resistance. Dual ball bearings in the motor provide a design life of 50,000 hours at 40°C ambient temperature, and the fan is balanced to ISO 1940 Grade 6.3 for low vibration. The FB3G355-48PK-20 is compliant with CE, RoHS, and REACH regulations, and is factory-tested for airflow, pressure, and current draw. This model is ideal for telecom base stations, data center cooling, battery energy storage systems, and industrial ventilation, where 48VDC power distribution is standard, and its high airflow per watt makes it a sustainable choice for green building projects.
| DC Backward Curved Centrifugal Fan |  |
|
| Type | FB3G355-48PK-20 | |
| Model | BLDCDC102 | |
| Nominal Voltage | VDC | 48 |
| Voltage range | VDC | 36~57 |
| Current draw | A | 6.0±10% |
| Speed(RPM) | min-1 | 1700±5% |
| Power consumption | W | 288±10% |
| Sound Pressure Level | dB(A） | 72.1±5% |
| Max. Air Flow | CFM / m3 /H | 2609.8/4434.6 |
| Max. Static Pressure | In.wg /Pa | 2.27/568 |
| Insulation class | ~ | Class B |
| Degree of protection | ~ | IP44 |
| Control Input | ~ | 0~10VDC / PWM |
| Signal Output | ~ | FG (Tach output ) |
Remarks：
Ⅰ. Standard cable length Refer to the figure below. The length of cable can be customized
Ⅱ. Conventional mode is 0-10V/PWM control, can optionally replace the communication protocol, detailed communication protocol, please contact technical personnel
Test condition：
Ⅰ.The test data is obtained under the specified environment conditions and installation mode
Ⅱ.Input Voltage---Operating voltage
Ⅲ.Temperature---Room temperature 25℃
Ⅴ.Humidity---65%RH
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.The power line and control line of the fan cannot be connected in reverse, otherwise it will burn out
Ⅴ.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
Ⅵ.The fan needs to be operated and used under the guidance of professional personnel to prevent children from coming into touch this product
Ⅶ.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
Ⅷ.As a part of the fan, it is not recommended to use the motor alone when there is no impeller or loading
1. High Efficiency: The FB3G355-48PK-20 delivers 4434.6 m3/h at 568 Pa while drawing only 288W, achieving 30-40% energy savings over equivalent AC fans through FANOVA's BLDC motor technology.
2. Industrial-Grade Impeller: The 355mm galvanized steel sheet impeller resists corrosion, wear and high temperatures, making the fan suitable for harsh industrial environments and corrosive gas streams.
3. Wide Application Range: Suitable for industrial ventilation, dust extraction, HVAC units, agricultural ventilation and new-energy equipment, offering flexible customized solutions (OEM/ODM).
4. Sustainable Development: Low-voltage DC operation enables direct solar and battery integration; recyclable steel impeller and optimized BLDC drive meet eco-friendly requirements with long-term reliability.
5. Easy Installation and Maintenance: Compact 355mm footprint, 0-10VDC/PWM speed control, FG tach output and standard cable make the fan simple to wire, control and service.
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 10days
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.
