FB3G280-48PL-20 Backward Curved Centrifugal Fan, 48VDC, 280mm, 2190 m3/h

When your telecom or industrial DC bus runs at 48 VDC, the FB3G280-48PL-20 backward centrifugal fan from FANOVA turns that standard rail into a high-pressure air mover without bulky AC conversion. This 280 mm impeller unit delivers a robust static pressure of 3.04 in.wg (760 Pa), making it ideal for pushing air through long duct runs, dense filter banks, or multi-outlet plenums. The 48 VDC motor, with a 36 to 57 V input range, integrates seamlessly into -48 V telecom plants, renewable energy storage systems, and DC microgrids, simplifying DCIM-based monitoring and control. At 2600 RPM and 395 W, this fan produces strong airflow while the large-diameter, glass-fiber-reinforced polypropylene impeller keeps rotational speed lower than smaller fans, reducing audible noise to 78 dB(A) and prolonging service life. The brushless DC motor (BLDCDC102) offers high efficiency and long operational reliability, with speed control via PWM or 0-10 V signals, enabling precise ventilation management. The die-cast aluminum endcaps and housing provide excellent heat dissipation and structural rigidity, while the 20 AWG, 160 mm cable simplifies wiring. Built for industrial-grade continuous duty, this fan handles harsh environments with robust protection and insulation, and is certified to CE and RoHS, making it a dependable choice for HVAC, battery cooling, and process ventilation. Choose the FB3G280-48PL-20 to replace multiple smaller fans with one high-static-pressure unit, saving space, wiring, and energy in 48 VDC systems.

The FB3G280-48PL-20 is a high-static-pressure backward centrifugal fan engineered for 48 VDC power architectures, where voltage stability and efficient air movement are critical. The impeller, with a 280 mm diameter, is molded from glass-fiber-reinforced polypropylene, a material choice that significantly reduces rotating mass compared to steel, lowering inertia and enabling rapid response to speed commands while offering excellent chemical resistance and fatigue endurance. The blade geometry is aerodynamically optimized for backward-curved operation, which inherently provides higher efficiency and a non-overloading power characteristic, ensuring the motor does not draw excessive current when the system static pressure drops unexpectedly. The motor, designated BLDCDC102, is a brushless DC unit with a rotor diameter of 102 mm, featuring a low-loss stator design and sensorless commutation that maintains high efficiency across a wide speed range. This motor accepts a nominal 48 VDC input with a total range of 36-57 VDC, accommodating battery voltage sag and charging transients in telecom and energy storage applications. At the rated operating point of 2600 RPM, the fan delivers up to 395 W of shaft power, translating to a maximum static pressure of 760 Pa (3.04 in.wg) and robust airflow that supports long duct runs and high-resistance filtration. Speed control is flexible, with support for PWM frequency input and 0-10 V analog voltage, allowing integration with building management systems, custom controllers, or simple potentiometer speed adjusters; the motor driver electronics include reverse polarity protection, overcurrent protection, and locked-rotor detection to safeguard the unit in fault conditions. The housing and endcaps are manufactured from die-cast aluminum alloy, providing high thermal conductivity to draw heat away from the motor windings and bearings, as well as excellent dimensional stability for precise mounting. Bearings are dual ball-type with a design life of 50,000 hours at 40°C ambient, ensuring years of maintenance-free operation in industrial environments. The electrical interface consists of a 20 AWG cable, 160 mm in length, with tinned leads for secure connection to power and control terminals. The fan is rated for continuous duty under ambient temperatures from -20°C to +60°C, with a noise level of 78 dB(A) at the rated speed, which is acceptable for equipment rooms and industrial areas. All components are manufactured under ISO9001 quality management, and the product carries CE and RoHS certifications, with optional UL certification available upon request. The FB3G280-48PL-20 is a prime choice for original equipment manufacturers seeking a reliable, high-pressure fan for 48 VDC-powered ventilation, cooling, and air handling systems where space, efficiency, and long life are paramount.

DC Backward Curved Centrifugal Fan
Type	FB3G280-48PL-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 FB3G280-48PL-20 delivers 2190 m3/h at 760 Pa while drawing only 395W, 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.