Key specification for this centrifugal fan: 48v, blade material Composite Material. Everything below is reproduced from the factory data sheet. Made by Guangzhou Yuexiu District Weikeheng Electronic Firm (2 years on the platform, typical reply ≤2h). For a binding price and lead time, send the volume you need and where it ships to.
Key Features of This Centrifugal Fan
- Model Number: R3G280-AH33-31
- Voltage: 48v
- Blade Material: Composite Material
- Speed: 2360 RPM
- Warranty: 1 Year
- Place Of Origin: Germany
Technical Specifications
| Type | Backward Curved Blade Radial Fan |
|---|---|
| Voltage | 48v |
| Speed | 2360 RPM |
| Blade Material | Composite Material |
| Mounting | Free Standing |
| Warranty | 1 Year |
| After-Sales Service Provided | Online support |
| Customized Support | ODM |
| Place Of Origin | Germany |
| Model Number | R3G280-AH33-31 |
| Color | Silver |
| Fan Type | EC Centrifugal Fan |
| Impeller Diameter | 280 mm |
| Bearing Type | Maintenance-Free Ball Bearing |
| Protection Class | IP42 |
| Efficiency | 56.2% |
| Control Type | VSD Integrated |
| Motor Protection | Overload / Locked Rotor Protection |
| Keywords | 280mm Backward Curved EC Fan |
| Selling Units | Single item |
| Single Package Size | 5X5X3 cm |
| Single Gross Weight | 4.0 kg |
Product Details
- Advantages: ✔ High efficiency operation ✔ Lower energy consumption ✔ Intelligent speed control ✔ Long service life
- Suitable for: HVAC systems Industrial ventilation Cooling equipment Air handling units
- Maintains airflow performance through: ✔ Filters ✔ Heat exchangers ✔ Duct systems ✔ High resistance airflow paths
- Supports: ✔ Integrated Variable Speed Drive ✔ Control Input ✔ Tachometer Feedback Allows accurate airflow adjustment and energy saving operation.




Parameter | Specification |
Model Number | R3G280-AH33-31 |
Fan Type | EC Centrifugal Fan |
Impeller Diameter | 280 mm |
Motor Technology | Integrated EC Brushless Motor |
Rated Voltage | 48 VDC |
Operating Voltage | 36–57 VDC |
Rated Current | 2.8 A |
Rated Power | 135 W |
Rated Speed | 2360 RPM |








Our fans are widely used in HVAC & ventilation, data center & IT cooling, industrial equipment, medical environments and transportation. They support central/precision air conditioners, fresh air & purification systems, and high-resistance exhaust for commercial & industrial buildings. Ideal for heat dissipation of server cabinets, inverters and power facilities. Suitable for industrial furnaces, boilers and generators. Low-noise models fit medical devices and cleanroom FFU systems. They also work for rail transit and cold chain transport under harsh operating conditions. |












separately. We will keep you updated with the exact delivery schedule once confirmed.
appoint your preferred freight forwarder for shipment.
Ordering and Pricing
- Minimum order quantity: 1 piece
- Volume pricing:
- 1–49 piece: US $85 / piece
- 50–79 piece: US $83 / piece
- 80–199 piece: US $80 / piece
- 200+ piece: US $78 / piece
- Ships from: China
- Customization: OEM and ODM accepted on qualifying volumes.
Frequently Asked Questions
What is the minimum order quantity for this centrifugal fan?
The standard minimum order quantity is 1 piece. Trial orders can usually be arranged for buyers evaluating the product before a full production run.
What warranty is provided?
The manufacturer provides a 1 Year warranty. Spare parts and technical support remain available after the warranty period.
Can the centrifugal fan be supplied for my local voltage?
The standard configuration is 48v. Alternative voltage and frequency builds are available when specified at the time of order.
Do you accept OEM or custom branding?
Yes. Custom logo, colour, packaging and specification changes are accepted on qualifying order volumes. Send your artwork and technical requirements with your enquiry.
How long does production and delivery take?
In-stock configurations typically ship within 7–15 days. Customised or large-volume orders are usually produced in 25–35 days, confirmed on order.
About the Manufacturer
This product is produced by Guangzhou Yuexiu District Weikeheng Electronic Firm, based in China. The company 2 years as a verified Alibaba.com supplier, Trading Company. Browse the full Guangzhou Yuexiu District Weikeheng Electronic Firm range on HVACR Nexus.
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