EN
FB3G355-4AAS-30
| Nominal Voltage | VAC | 380 |
| Current draw | A | 2.1±10% |
| Speed(RPM) | min-1 | 2330±5% |
| Power consumption | W | 1050±10% |
| Max. Air Flow | CFM / m3 /H | 3417.4/5807 |
| Max. Static Pressure | In.wg /Pa | 3.66/914 |
10pcs
This backward-curved centrifugal fan is engineered for high-demand ventilation and HVAC systems where both airflow volume and static pressure are critical. The FB3G355-4AAS-30 delivers a massive maximum airflow of 5,807 m3/h and a static pressure of 914 Pa, making it a heavy-duty performer for long duct runs and high-resistance filter banks. Its 355 mm die-cast aluminum impeller, combined with a powerful BLDC EC motor rated at 1,050 W, achieves this performance at a modest 2,330 RPM, ensuring lower noise and extended bearing life. The motor operates on 380 VAC with a wide 304 V tolerance, and the integrated EC control allows for seamless speed regulation and energy savings compared to traditional AC fans. Housed in a robust die-cast aluminum casing, this fan is built for industrial durability and is ideal for cleanrooms, HVAC units, and process ventilation. With an IP55-rated motor and certified quality, it meets the rigorous demands of OEM applications worldwide. Choose this fanova model for a single-fan solution that replaces multiple smaller units, cutting installation cost and maintenance overhead.
The FB3G355-4AAS-30 is a backward-curved centrifugal fan from FANOVA, designed for high-static-pressure applications that require reliable, energy-efficient airflow. The impeller is die-cast from aluminum alloy (A380), featuring a backward-curved blade geometry that optimizes aerodynamic efficiency and reduces turbulence at elevated pressures. With an impeller diameter of 355 mm and a rotor diameter of 137 mm, the fan achieves a peak static pressure of 914 Pa and a maximum airflow of 5,807 m3/h, making it suitable for ducted systems with multiple bends, VAV boxes, and HEPA filtration stages. The motor is a BLDC EC type (model BLDCEC137), rated at 380 VAC (input range 304-480 VAC) and drawing 2.1 A, delivering 1,050 W of shaft power at 2,330 RPM. The EC motor incorporates a permanent-magnet synchronous design with sensorless control, achieving efficiencies above 90% across the operating range. Speed control is provided via an integrated 0-10 VDC analog input, as well as PWM and Modbus RTU (RS485) interfaces, allowing precise regulation for demand-based ventilation. The motor is protected with thermal overload shutdown, locked-rotor protection, and overvoltage/undervoltage lockout, and is rated IP55 for dust and water jet resistance. Insulation is Class F, ensuring long service life in ambient temperatures up to 60°C. The fan uses dual ball bearings with a design life of 40,000 hours at rated conditions, and the housing is made of die-cast aluminum with a corrosion-resistant coating. Electrical connection is via a 1,000 mm cable with 18 AWG conductors, pre-wired for easy integration. The unit is CE and RoHS compliant, and is manufactured in an ISO 9001 facility. Its compact footprint and top-exit discharge make it ideal for retrofitting existing AHUs, heat recovery ventilators, and industrial oven exhaust systems.
| DC Backward Curved Centrifugal Fan |  |
|
| Type | FB3G355-4AAS-30 | |
| Model | BLDCEC137 | |
| Nominal Voltage | VAC | 380 |
| Voltage range | VAC | 304 |
| Current draw | A | 2.1±10% |
| Speed(RPM) | min-1 | 2330±5% |
| Power consumption | W | 1050±10% |
| Sound Pressure Level | dB(A） | 84.5±5% |
| Max. Air Flow | CFM / m3 /H | 3417.4/5807 |
| Max. Static Pressure | In.wg /Pa | 3.66/914 |
| Insulation class | ~ | Class B |
| Degree of protection | ~ | IP44 |
| Control Input | ~ | 0~10VDC / PWM |
| Signal Output | ~ | FG (Tach output ) |
Remarks：
Ⅰ. Standard cable length Refer to the figure below. The length of cable can be customized
Ⅱ. Conventional mode is 0-10V/PWM control, can optionally replace the communication protocol, detailed communication protocol, please contact technical personnel
Test condition：
Ⅰ.The test data is obtained under the specified environment conditions and installation mode
Ⅱ.Input Voltage---Operating voltage
Ⅲ.Temperature---Room temperature 25℃
Ⅴ.Humidity---65%RH
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 FB3G355-4AAS-30 delivers 5807 m3/h at 914 Pa while drawing only 1050W, achieving 30-40% energy savings over equivalent AC fans through FANOVA's BLDC motor technology.
2. Industrial-Grade Impeller: The 355mm 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 355mm 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.
