FB3G400-48AP-20 Backward Curved Centrifugal Fan, 48VDC, 400mm, 4347 m3/h

When your ventilation system demands an uncompromising blend of high-volume airflow, robust power, and the reliability of a 48V DC platform, the FANOVA FB3G400-48AP-20 backward centrifugal fan is engineered to deliver. This model is a powerhouse, generating a maximum airflow of 4347 m3/h (2558 CFM), which allows it to replace multiple smaller fans in many industrial and commercial applications, simplifying system design and reducing total cost of ownership. The prime mover is a high-efficiency BLDCDC102 brushless DC motor that consumes up to 275W at 1460 RPM, converting electrical input into substantial static pressure of up to 609 Pa (2.436 in.wg) to overcome duct resistance and filter loading. Operating on industry-standard 48VDC (36-57V range) power, it is perfectly suited for telecom, data center, and renewable energy systems where DC power distribution is preferred for safety and efficiency. The fan's large 400mm die-cast aluminum impeller rotates at a modest speed to minimize noise (75.8 dB(A)) while maximizing volumetric throughput, a key advantage for noise-sensitive environments. Featuring the FANOVA quality hallmark, this fan includes a 20AWG cable (180mm length) and is built to withstand demanding continuous-duty cycles. Its construction from corrosion-resistant aluminum alloys ensures longevity in harsh industrial atmospheres. For applications requiring high static pressure, high power, and dependable 48V operation, the FB3G400-48AP-20 is the definitive solution. Trust FANOVA's OEM/ODM expertise to integrate this fan into your next-generation equipment.

The FB3G400-48AP-20 is a premium backward-curved centrifugal fan designed for heavy-duty ventilation tasks that require a superior combination of high volumetric flow and elevated static pressure. Its impeller, measuring a substantial 400mm in diameter, is precision-cast from die-cast aluminum alloy, a material choice that provides an excellent strength-to-weight ratio, inherent corrosion resistance, and dimensional stability even under continuous thermal stress. This large-diameter impeller with backward-curved blades ensures aerodynamic efficiency, allowing the fan to achieve a maximum airflow of 4347 m3/h while generating a maximum static pressure of 609 Pa, making it ideal for long duct runs, high-resistance filtration systems, and multi-outlet plenums. The fan is powered by FANOVA's proprietary BLDCDC102 brushless DC motor, a high-efficiency design that provides an extended operational lifespan by eliminating brush wear and reducing maintenance requirements. This motor operates at a nominal voltage of 48VDC, with a wide input range of 36 to 57VDC, offering robust tolerance to voltage fluctuations common in battery-backed or renewable energy systems. At full load, the motor draws 5.8A and consumes 275W, delivering 1460 RPM to the impeller. The electrical interface consists of a 20AWG lead wire, 180mm in length, providing a secure and straightforward connection to your control system. The motor supports PWM speed control or 0-10V analog input (if applicable), enabling precise airflow modulation to match changing system demands, thereby optimizing energy consumption. The fan's housing and endcaps are also constructed from die-cast aluminum, ensuring a rigid frame that minimizes vibration and noise, measured at a moderate 75.8 dB(A). The unit employs sealed ball bearings designed for a long service life, often exceeding 50,000 hours, ensuring reliability in continuous operation. The fan is manufactured under strict ISO9001 quality management systems and is compliant with CE and RoHS directives, ensuring safety and environmental responsibility. With its 48V DC architecture, this fan is particularly suited for telecom shelters, data center cooling, solar-powered ventilators, and industrial process equipment where reliability, high static pressure, and energy efficiency are non-negotiable.

DC Backward Curved Centrifugal Fan
Type	FB3G400-48AP-20
Model	BLDCDC102

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 FB3G400-48AP-20 delivers 4347 m3/h at 609 Pa while drawing only 275W, achieving 30-40% energy savings over equivalent AC fans through FANOVA's BLDC motor technology.

2. Industrial-Grade Impeller: The 400mm 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 400mm 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.