BC280 — Centrifugal Fan
SUNXFAN BC280 series: 5 models. All figures below are manufacturer datasheet values.
Model matrix
| Model | Airflow | Max static pressure | Voltage | Power | Speed | Noise | Speed control |
|---|---|---|---|---|---|---|---|
| BC280A-E092D1-01 | 1540 m³/h | 550 Pa | 115 V AC | 125 W | 2300 r/min | 71 dB(A) | 0-10V/PWM / Modbus RTU(RS485) |
| BC280A-E092D3-01 | 1540 m³/h | 715 Pa | 230 V AC | 125 W | 2300 r/min | 71 dB(A) | 0-10V/PWM / Modbus RTU(RS485) |
| BC280A-E092E1-02 | 1800 m³/h | 715 Pa | 115 V AC | 220 W | 2600 r/min | 77 dB(A) | 0-10V/PWM / Modbus RTU(RS485) |
| BC280A-E092E3-02 | 1800 m³/h | 715 Pa | 230 V AC | 200 W | 2600 r/min | 77 dB(A) | 0-10V/PWM / Modbus RTU(RS485) |
| BC280B-E092E3-02 | 2000 m³/h | 460 Pa | 230 V AC | 200 W | 1700 r/min | 65 dB(A) | 0-10V/PWM / Modbus RTU(RS485) |
BC280A-E092D1-01 — EC280 Backward-Curved Centrifugal Fan — 1540 m³/h
Specifications
- Category: Centrifugal Fan
- Motor: EC
- Airflow: 1540 m³/h
- Max static pressure: 550 Pa
- Voltage: 115 V AC
- Power: 125 W
- Speed: 2300 r/min
- Noise: 71 dB(A)
- Protection: IP54
- Temperature: -25 °C ~ +60 °C
- Impeller: Galvanized steel plate
- Bearing: NSK ball bearing
- Speed control: 0-10V/PWM / Modbus RTU(RS485)
- MOQ: 240 PCS
- FOB: FOB Nansha Guangzhou
- Lead time: 25-30 days
FAQ
Q: What are the benefits of an EC backward-curved centrifugal fan being compatible with both 0-10V/PWM and Modbus RTU (RS485) for speed control?
A: Equipping an EC backward-curved centrifugal fan with dual compatibility for both analog/PWM signals and digital Modbus RTU (RS485) bridges the gap between simple standalone control and centralized smart automation.
Key Benefits of Dual-Interface Compatibility
1. SKU Consolidation & Supply Chain Efficiency
- Single Fan Model for All Markets: OEMs and equipment manufacturers don’t need to engineer or stock two separate fan variants—one for entry-level analog equipment and another for high-end digital automation. A single fan SKU services simple stand-alone units as well as networked smart buildings or containerized plant factories.
- Lower Inventory Overhead: Managing a universal motor controller reduces procurement complexity, warehousing costs, and lead times across product lines.
2. Simplified Field Commissioning & Local Diagnostics
- Instant On-Site Testing: Technicians can test and commission the fan using a simple 0-10V handheld potentiometer or PWM generator without bringing a laptop, Modbus master PLC, or network configuration software to the job site.
- Independent Calibration: Allows quick verification of mechanical balance, rotation direction, and airflow resistance before the central automation bus is fully wired or programmed.
3. Redundancy & Fail-Safe Architecture
- Primary Digital Control + Hardwired Safety Override: Industrial systems can use Modbus RTU for real-time speed adjustment and deep telemetry (power consumption, RPM, internal motor temperature, and fault codes) while reserving the 0-10V or PWM input as a hardwired emergency override (e.g., high-temperature cutoff or fire purge).
- Communication Loss Fallback: Many EC drives can be configured to automatically fall back to a preset 0-10V signal or fixed PWM duty cycle if RS485 communication drops, ensuring continuous ventilation and preventing critical system shutdowns.
4. Flexible Upgrade Path for End Users
- Phased Automation: Equipment builders can release a base model operating on low-cost analog sensor loops (e.g., direct 0-10V from a CO2 or pressure sensor) and offer an upgrade to full Modbus/IoT network integration as a software or option-card add-on without replacing the fan motor.
5. Hybrid Topology Support in Complex Machinery
- Localized Control with Centralized Monitoring: In large multi-zone systems (such as multi-rack agricultural cleanrooms or fan walls), localized PID loops can use fast-responding 0-10V signals for instant speed adjustments, while the master PLC polls all fans over RS485 for preventive maintenance, energy logging, and diagnostic monitoring.
BC280A-E092D3-01 — EC280 Backward-Curved Centrifugal Fan — 1540 m³/h
Specifications
- Category: Centrifugal Fan
- Motor: EC
- Airflow: 1540 m³/h
- Max static pressure: 715 Pa
- Voltage: 230 V AC
- Power: 125 W
- Speed: 2300 r/min
- Noise: 71 dB(A)
- Protection: IP54
- Temperature: -25 °C ~ +60 °C
- Impeller: Galvanized steel plate
- Bearing: NSK ball bearing
- Speed control: 0-10V/PWM / Modbus RTU(RS485)
- MOQ: 240 PCS
- FOB: FOB Nansha Guangzhou
- Lead time: 25-30 days
BC280A-E092E1-02 — EC280 Backward-Curved Centrifugal Fan — 1800 m³/h
Specifications
- Category: Centrifugal Fan
- Motor: EC
- Airflow: 1800 m³/h
- Max static pressure: 715 Pa
- Voltage: 115 V AC
- Power: 220 W
- Speed: 2600 r/min
- Noise: 77 dB(A)
- Protection: IP54
- Temperature: -25 °C ~ +60 °C
- Impeller: Galvanized steel plate
- Bearing: NSK ball bearing
- Speed control: 0-10V/PWM / Modbus RTU(RS485)
- MOQ: 240 PCS
- FOB: FOB Nansha Guangzhou
- Lead time: 25-30 days
BC280A-E092E3-02 — EC280 Backward-Curved Centrifugal Fan — 1800 m³/h
Specifications
- Category: Centrifugal Fan
- Motor: EC
- Airflow: 1800 m³/h
- Max static pressure: 715 Pa
- Voltage: 230 V AC
- Power: 200 W
- Speed: 2600 r/min
- Noise: 77 dB(A)
- Protection: IP54
- Temperature: -25 °C ~ +60 °C
- Impeller: Galvanized steel plate
- Bearing: NSK ball bearing
- Speed control: 0-10V/PWM / Modbus RTU(RS485)
- MOQ: 240 PCS
- FOB: FOB Nansha Guangzhou
- Lead time: 25-30 days
FAQ
Q: Why Backward-Curved Centrifugal fan Wins on Efficiency？
A: In a backward-curved impeller, air enters the center and flows outward along the blades. Because the blades curve away from the rotation, the air exits the impeller with high static pressure and relatively low velocity.
Forward-curved blades act more like paddles, throwing the air out at high speeds. This requires a tight, spiral scroll housing to catch that fast-moving air and slow it down, converting the speed into pressure. That conversion process inside the housing creates turbulence and significant energy loss, dragging down overall aerodynamic efficiency.
BC280B-E092E3-02 — EC280 Backward-Curved Centrifugal Fan(Impeller Height:110mm) — 2000 m³/h
Specifications
- Category: Centrifugal Fan
- Motor: EC
- Airflow: 2000 m³/h
- Max static pressure: 460 Pa
- Voltage: 230 V AC
- Power: 200 W
- Speed: 1700 r/min
- Noise: 65 dB(A)
- Protection: IP54
- Temperature: -25 °C ~ +60 °C
- Impeller: Galvanized steel plate
- Bearing: NSK ball bearing
- Speed control: 0-10V/PWM / Modbus RTU(RS485)
- MOQ: 240 PCS
- FOB: FOB Nansha Guangzhou
- Lead time: 25-30 days
FAQ
Q: Forward-curved vs. backward-curved EC centrifugal fans: Which has higher aerodynamic efficiency?
A: Backward-curved EC centrifugal fans have significantly higher aerodynamic efficiency than forward-curved fans. The core difference lies in the blade geometry and how it converts kinetic energy into static pressure.
The Efficiency Breakdown
| Feature | Backward-Curved Fan | Forward-Curved Fan |
|---|---|---|
| Peak Aerodynamic Efficiency | Up to 75–85% | Typically 55–65% |
| Blade Design | Blades curve away from the direction of rotation. | Blades curve into the direction of rotation (like a scoop). |
| Energy Conversion | Converts most of the mechanical energy directly into static pressure within the impeller itself. | Generates high air velocity (kinetic energy) which then requires a scroll housing to convert that velocity into static pressure. |
| Power Characteristic | Non-overloading: Maximum power draw occurs near peak efficiency. Even if system resistance drops to zero (free air), the motor will not overload. | Overloading: Power draw increases as airflow increases. If system resistance drops, the fan will pull too much air and overload the motor. |
When to Use Which?
While backward-curved fans are more efficient, they require higher rotational speeds (RPM) to achieve the same airflow as a forward-curved fan, which can result in a different acoustic profile.
- Choose Backward-Curved: When high efficiency, low energy consumption, and high static pressure are critical (e.g., HRV units, precision cooling, HEPA filtration systems, and large HVAC arrays).
- Choose Forward-Curved: When lower operating speeds, quieter acoustics at lower pressures, and compact sizing are needed, and peak efficiency is less critical (e.g., residential fan coils, small air curtains).
Q: Galvanized steel or PA6+GF25 impeller — what drives the choice?
A: Both materials are offered around this wheel size. Galvanized steel (this model, powder-coated) holds its balance at temperature and tolerates grease and solvent traces — kitchen extract and process air. PA6+GF25 is about half the density, so bearings and motor start gently, and it shrugs off the humidity and salt that eventually attack any coating. Rule of thumb: hot or chemically loaded air points to steel; humidity, salt air and weight-sensitive mounts point to polymer.
Last updated: 2026-11-02