FB3G310-48AY-2F Backward Curved Centrifugal Fan, 48VDC, 310mm, 2800.5 m3/h

The FB3G310-48AY-2F sets a new benchmark for high-density cooling and ventilation by delivering a maximum airflow of 1648.1 CFM (2800.5 m³/h) from a single 310 mm backward curved impeller, enabling you to replace multiple smaller fans with one compact unit. Engineered for 48 VDC telecom and data center environments, this model operates across a 36–57 VDC input range with a nominal current of 4.4 A, making it ideal for DCIM-integrated server racks, battery backup systems, and DC-powered HVAC units. The die-cast aluminum impeller and housing provide exceptional rigidity and thermal conductivity, ensuring stable performance even under continuous heavy-duty operation at 1950 RPM and 210 W power draw. With a maximum static pressure of 2.1 in.wg (525 Pa), it can overcome the resistance of dense filters, long duct runs, and multiple outlets, making it a versatile choice for industrial air handling. The BLDCDC102 brushless DC motor delivers high efficiency and quiet operation at 68.3 dB(A), reducing noise pollution in occupied spaces. Equipped with 20 AWG cables (150 mm length) and built-in speed control interfaces, this fan integrates easily into existing 48 V systems and supports PWM or analog control for precise airflow management. The motor features thermal protection and Class B insulation, ensuring safety and long service life, while the aluminum construction resists corrosion in harsh environments. Certified to CE and RoHS standards, the FB3G310-48AY-2F is a reliable, high-performance solution for OEMs seeking a powerful yet energy-efficient fan. Choose FANOVA for a customized fan that meets your exact specifications with robust engineering and global compliance.

The FB3G310-48AY-2F is a premium backward curved centrifugal fan designed for demanding high-airflow applications where space, efficiency, and reliability are non-negotiable. At its core is a 310 mm diameter die-cast aluminum impeller with backward curved blades, precision-cast to achieve a balanced aerodynamic profile that minimizes turbulence and maximizes static efficiency. The impeller is fitted onto a 102 mm rotor, and the entire rotating assembly is dynamically balanced to ISO 1940 G2.5 grade, ensuring vibration-free operation even at maximum speed of 1950 RPM. The housing is also constructed from die-cast aluminum, providing a rigid, corrosion-resistant enclosure that protects the internal components and dissipates heat effectively. This material choice not only extends the fan's lifespan in industrial environments but also reduces weight compared to steel, easing installation and structural load. The fan is driven by a BLDCDC102 brushless DC motor, which employs a sensorless control algorithm for precise commutation and high efficiency across a wide speed range. The motor accepts a nominal 48 VDC supply with an allowable input window of 36 VDC to 57 VDC, accommodating voltage fluctuations common in battery-backed systems. At rated voltage, the fan draws 4.4 A and consumes 210 W, delivering a maximum airflow of 1648.1 CFM (2800.5 m³/h) at free air and a maximum static pressure of 2.1 in.wg (525 Pa) at closed condition. The fan's performance curve is steep and stable, making it suitable for systems with variable resistance. For speed control, the FB3G310-48AY-2F supports multiple interfaces: a 0–10 V analog input, a PWM frequency input (1 kHz to 10 kHz), and an open-collector tachometer output, allowing integration with building management systems, DCIM platforms, or custom controllers. The electrical interface is via a 20 AWG cable, 150 mm in length, with stripped and tinned leads for secure connection. The motor includes overcurrent, overvoltage, and thermal overload protection, with auto-restart after fault recovery. Insulation class is Class B, and the fan is rated for a working temperature range of -20°C to +60°C, with storage capability from -40°C to +70°C. Bearings are dual ball bearings with a rated life of 50,000 hours at 40°C, ensuring maintenance-free operation for years. The fan also features an IP54-rated housing (with optional IP55 upgrade) to guard against dust and splashing water, making it suitable for indoor and semi-outdoor installations. The FB3G310-48AY-2F meets CE and RoHS directives and is manufactured under ISO 9001 quality management systems, with 100% production testing for performance and safety. FANOVA offers full customization options including cable length, connectors, and coating, ensuring this fan can be tailored to your exact OEM requirements.

DC Backward Curved Centrifugal Fan
Type	FB3G310-48AY-2F
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 FB3G310-48AY-2F delivers 2800.5 m3/h at 525 Pa while drawing only 210W, achieving 30-40% energy savings over equivalent AC fans through FANOVA's BLDC motor technology.

2. Industrial-Grade Impeller: The 310mm 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 310mm 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.