FB3G280-4APK-61 Backward Curved Centrifugal Fan, 380VAC, 280mm, 2190 m3/h

Powering through demanding ventilation duties without surrendering acoustic comfort, the FANOVA FB3G280-4APK-61 is a 280mm backward centrifugal fan engineered for heavy-duty continuous operation. This 380VAC model drives a 250W BLDC EC motor to deliver high static pressure up to 665 Pa, making it ideal for long duct runs and high-resistance filtration systems. The large impeller, crafted from glass-fiber reinforced polypropylene, enables efficient airflow at a lower speed of 2400 RPM, which translates to quieter performance and reduced mechanical stress. With a sound level of 72.5 dB(A), it strikes an effective balance between power and workplace comfort, allowing a single fan to replace multiple smaller units in industrial HVAC cabinets. The integrated EC motor provides variable speed control via 0-10V or PWM signals, ensuring precise airflow matching and significant energy savings across partial loads. Built with a die-cast aluminum housing and IP54-rated protection, this fan withstands harsh environments while its sealed ball bearings offer a lifespan exceeding 50,000 hours. Certified with CE and RoHS compliance, the FB3G280-4APK-61 is the dependable choice for OEMs needing robust, high-pressure air movement in cleanrooms, heat recovery units, and agricultural ventilation systems.

The FB3G280-4APK-61 belongs to FANOVA's FB3G series of backward-curved centrifugal fans, featuring a 280mm impeller that is optimized for high-pressure applications. The impeller is manufactured from polypropylene reinforced with glass fibers (PP+GF), a material chosen for its excellent chemical resistance, dimensional stability, and low inertia. This lightweight yet sturdy construction reduces rotational mass, allowing the fan to accelerate quickly and operate with lower vibration levels compared to metal counterparts. The blade design follows a backward-curved aerodynamic profile, which minimizes turbulence and airflow separation, resulting in high efficiency across a wide operating range.

At the heart of this fan is the BLDCEC102 motor, a brushless DC motor with integrated electronics that runs directly from a 380VAC three-phase supply (range 304-480VAC). The motor delivers 250W of shaft power at 2400 RPM, drawing only 0.4A, which highlights its exceptional energy efficiency. The EC technology enables continuous speed modulation through external 0-10V analog or PWM digital control signals, allowing the fan to match real-time system demand. This not only reduces energy consumption by up to 30% compared to traditional AC motors but also enhances system longevity by preventing overspeed and thermal stress.

The fan achieves a maximum static pressure of 665 Pa and a free-air flow rate of approximately 1800 m3/h, making it suitable for installations with high-resistance ductwork, HEPA filters, or multiple discharge outlets. The acoustic output is rated at 72.5 dB(A), a level that is acceptable for industrial environments while remaining lower than many comparable metal fans due to the dampening properties of the composite impeller.

Mechanically, the fan features a die-cast aluminum end cap and housing that provides structural rigidity and effective heat dissipation. The rotor has a diameter of 102mm, and the entire assembly is balanced to G2.5 grade, ensuring smooth operation. Sealed ball bearings are used at both ends, with a design life of 50,000 hours at 40°C ambient temperature, suitable for year-round continuous service.

Electrical connectivity is provided through an 18AWG cable, 226mm in length, which is pre-wired for easy integration into control panels. The fan is protected against overcurrent, overvoltage, and overheating through the built-in motor electronics, and it comes with an IP54 ingress protection rating, guarding against dust and water splashes typical in industrial settings.

Quality assurance includes CE and RoHS certifications, and the production process adheres to ISO9001 standards. FANOVA offers flexible customization options for OEM clients, including alternative cable lengths, connectors, and coating finishes, ensuring seamless compatibility with existing systems.

DC Backward Curved Centrifugal Fan
Type	FB3G280-4APK-61
Model	BLDCEC102

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 FB3G280-4APK-61 delivers 2190 m3/h at 665 Pa while drawing only 250W, achieving 30-40% energy savings over equivalent AC fans through FANOVA's BLDC motor technology.

2. Industrial-Grade Impeller: The 280mm 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 280mm 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.