EN
FB3G175-24LH-7N
| Nominal Voltage | VDC | 24 |
| Current draw | A | 3.7±10% |
| Speed(RPM) | min-1 | 3900±5% |
| Power consumption | W | 88±10% |
| Max. Air Flow | CFM / m3 /H | 403.7/686 |
| Max. Static Pressure | In.wg /Pa | 2.47/617 |
50pcs
The FB3G175-24LH-7N is a 24 VDC backward centrifugal fan engineered for low-voltage, off-grid, and battery-powered ventilation systems where energy efficiency is non-negotiable. Drawing only 88 W at full speed, this model delivers a maximum airflow of 686 m3/h and a static pressure of 617 Pa, making it an ideal choice for solar-powered HVAC, telecom enclosures, and remote monitoring stations. Its glass-fiber reinforced polypropylene impeller combines lightweight construction with excellent chemical resistance, while the die-cast aluminum housing ensures durability in demanding environments. The fan operates across a 16 to 28 VDC input range, allowing precise speed control via PWM or analog signals, and its 3900 RPM brushless DC motor offers long service life with low maintenance. With a noise level of 69 dB(A), it balances performance with acoustic comfort for indoor installations. The FB3G175-24LH-7N is protected against overcurrent, overvoltage, and reverse polarity, and comes with a 20 AWG cable for simple integration. Certified to CE and RoHS standards, this fan is suited for renewable energy systems, battery backup units, and medical equipment. Choose FANOVA for reliable low-power airflow solutions that reduce total cost of ownership.
The FB3G175-24LH-7N is a 24 VDC backward curved centrifugal fan that excels in low-power, high-efficiency applications, particularly in new energy and off-grid environments. The impeller, with a diameter of 175 mm, is molded from polypropylene reinforced with 30% glass fiber, offering a perfect balance between mechanical strength and weight reduction. This material choice provides excellent resistance to a wide range of chemicals and moisture, making the fan suitable for corrosive air streams in industrial and agricultural settings. The die-cast aluminum endcaps and housing dissipate heat effectively and protect the internal components from physical damage and environmental contaminants. The heart of the fan is a brushless DC motor featuring a 72 mm rotor diameter, which delivers 3900 RPM at 24 VDC and consumes only 88 W, achieving an efficiency that minimizes wasted energy in battery-powered systems. The motor is electronically commutated, eliminating brush wear and extending operational life to over 50,000 hours when cooled adequately. Speed control is flexible: the fan accepts PWM frequency signals, 0-10 VDC analog voltage, or simple on/off switching, allowing integration with building management systems or custom controllers. Electrical ratings include a nominal voltage of 24 VDC with a working range from 16 to 28 VDC, a maximum current draw of 3.7 A, and built-in protection against reverse polarity, overcurrent, and overvoltage conditions. The fan is insulated to Class B and rated IP44 for protection against splashing water and solid particles, making it suitable for sheltered outdoor installations. The 500 mm cable, sized at 20 AWG, provides easy connection to power supplies or controller boards. The fan's aerodynamic design achieves a maximum airflow of 686 m3/h and a static pressure of 617 Pa, enabling it to overcome moderate duct resistance or filter loads. Acoustic output is measured at 69 dB(A), which is acceptable for most commercial environments. Each unit undergoes rigorous testing for performance and safety, and the product is certified with CE and RoHS compliance. FANOVA's commitment to quality is reflected in the precision balancing of the impeller and the use of double-sealed ball bearings that require no maintenance. This fan is an excellent solution for solar ventilation, battery cooling, telecom cabinets, and any application where low power consumption and reliable DC operation are critical.
| DC Backward Curved Centrifugal Fan |  |
|
| Type | FB3G175-24LH-7N | |
| Model | BLDCDC72 | |
| Nominal Voltage | VDC | 24 |
| Voltage range | VDC | 16~28 |
| Current draw | A | 3.7±10% |
| Speed(RPM) | min-1 | 3900±5% |
| Power consumption | W | 88±10% |
| Sound Pressure Level | dB(A） | 69±5% |
| Max. Air Flow | CFM / m3 /H | 403.7/686 |
| Max. Static Pressure | In.wg /Pa | 2.47/617 |
| 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 FB3G175-24LH-7N delivers 686 m3/h at 617 Pa while drawing only 88W, achieving 30-40% energy savings over equivalent AC fans through FANOVA's BLDC motor technology.
2. Industrial-Grade Impeller: The 175mm 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 175mm 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.
