FB3G280-48GY-90 Backward Curved Centrifugal Fan, 48VDC, 280mm, 2190 m3/h

When telecom and data center enclosures demand reliable heat extraction without the complexity of AC power distribution, the FANOVA FB3G280-48GY-90 backward centrifugal fan delivers a native 48VDC solution engineered for direct integration into -48V telecom racks and DCIM-managed systems. This model combines a large 280mm galvanized steel impeller with a high-efficiency BLDCDC92 brushless DC motor, producing a maximum static pressure of 1.76 inches of water (440 Pa) while maintaining a noise level of just 71 dB(A) at full speed. The fan operates across a wide 36V to 57V input range, ensuring stable performance during battery backup transitions and voltage fluctuations common in central office environments. At 1940 RPM, the FB3G280-48GY-90 consumes only 139.2W and draws 2.9A, making it an energy-conscious choice for continuous-duty cooling in remote cabinets and edge computing sites. The die-cast aluminum housing and galvanized steel impeller provide exceptional corrosion resistance and mechanical strength, suitable for industrial and outdoor telecom shelters. With PWM speed control and locked-rotor protection, this fan offers precise airflow modulation and long-term reliability, backed by dual ball bearings rated for extended service life. Typical applications include telecom base stations, server rooms, battery cabinets, and renewable energy storage systems where 48VDC power is standard. The FB3G280-48GY-90 is UL/CE certified and available as a FANOVA OEM/ODM solution, ready for customization to meet specific connector, cable length, or performance requirements.

The FANOVA FB3G280-48GY-90 is a backward-curved centrifugal fan purpose-built for high-static-pressure applications in 48VDC-powered environments, combining a large-diameter rotor with a compact, lightweight die-cast aluminum housing. The impeller, fabricated from galvanized steel sheet, features a backward-inclined blade geometry that maximizes aerodynamic efficiency, reducing turbulence and enabling high airflow at lower rotational speeds compared to forward-curved designs. With an impeller diameter of 280mm and a rotor diameter of 92mm, the fan achieves a rated speed of 1940 RPM, producing a maximum static pressure of 440 Pa (1.76 in.wg) and a noise output of 71 dB(A), balancing acoustic comfort with cooling capacity for rack-mounted electronics. The core of this model is the BLDCDC92 brushless DC motor, a 48V class unit designed to operate over an extended input range of 36V to 57V, accommodating both nominal -48V telecom supplies and battery discharge profiles. The motor delivers 139.2W of shaft power at 2.9A, with an efficiency-enhancing electronic commutation system that eliminates brush wear and reduces electromagnetic interference. Speed control is implemented via a standard PWM interface, allowing the fan to modulate airflow from 0 to 100% based on thermal load, while built-in control electronics provide soft-start, reverse polarity protection, and locked-rotor auto-restart, safeguarding the motor and driver circuitry in harsh electrical conditions. The stator is insulated to Class B, and the entire motor assembly is sealed against dust and moisture, suitable for operation in ambient temperatures up to 70°C without derating. For mechanical reliability, the fan employs dual ball bearings, each pre-lubricated with high-temperature grease and rated for a minimum L10 life of 50,000 hours at 60°C, ensuring extended maintenance-free operation in continuous-duty telecom installations. The housing, made from die-cast aluminum, is precision-machined to maintain tight tolerances and features a powder-coated finish that resists corrosion in humid or salt-laden air, typical of outdoor shelters and coastal sites. Electrical connection is made via a 20AWG lead wire, 125mm in length, with stripped and tinned ends, though custom connectors (e.g., Molex, JST, or waterproof types) can be supplied to match specific backplane or cable harness requirements. The FB3G280-48GY-90 also includes a hall sensor feedback line for tachometer output, enabling real-time speed monitoring and closed-loop control through DCIM or BMS systems. Each unit undergoes 100% run-in testing for vibration, current draw, and air performance, and is certified to UL, CE, and RoHS standards, with optional IP55 protection available for outdoor exposed installations. As a FANOVA OEM/ODM product, the fan can be configured with alternative cable lengths, connector types, or custom performance curves, making it a versatile building block for thermal management in telecom, industrial, and new energy applications.

DC Backward Curved Centrifugal Fan
Type	FB3G280-48GY-90
Model	BLDCDC92

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 FB3G280-48GY-90 delivers 2190 m3/h at 440 Pa while drawing only 139.2W, 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.