Digitised from the catalogue curve at standard air (20 °C, 101.3 kPa, 1.2 kg/m³); one curve per voltage / speed grade. The system resistance curve depends on the actual ductwork — confirm the operating point on site. Need an engineer to verify the duty point? Contact us or add the model to your RFQ and note the duty point.
- ImpellerØ310 mm12.2 in
- Max airflow2,524 m³/h1,485 CFM
- Max static pressure530 Pa2.13 in. wg
- Voltage48 V
- Speed1,970 rpm
- Input power230 W
- Noise75 dB(A)
LWBD3G310-102NH-04 DC Backward Curved Centrifugal Fan Ø310 mm
Ø310 mm | DC | Max airflow 2,524 m³/h | Max static pressure 530 Pa | 75 dB(A)
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 18-month warranty
- CE · ETL · RoHS
Need a non-standard size or another format? Ask an engineer or search the download center.
LWBD3G310-102NH-04 is a LONGWELL DC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø310 mm, rated 48 V DC, maximum airflow 2,524 m³/h, maximum static pressure 530 Pa, noise 75 dB(A), input power 230 W. The low-voltage brushless DC motor suits battery-powered equipment and electronics cooling with speed control on demand.
Technical data
| Model | LWBD3G310-102NH-04 |
|---|---|
| Series | LWBD3G310 |
| Motor type | DC |
| Rated voltage | 48 V |
| Current | 4.8 A |
| Input power | 230 W |
| Speed | 1,970 rpm |
| Max. airflow | 2,524 m³/h |
| Max. airflow (CFM) | 1,485 CFM |
| Max. static pressure | 530 Pa |
| Noise | 75 dB(A) |
| Ambient temperature | -25 ~ 60 °C |
| Storage temperature | -25 ~ 60℃ |
| Humidity | 5 ~ 90 % RH |
| Altitude | < 1000m |
| Impeller diameter | Ø310 mm |
| Rotor diameter | 102 |
| Impeller material | Aluminum alloy ( Impeller ) |
| Protection class | IP44 |
| Insulation class | B |
| Bearing | Maintenance-free deep groove ball bearings |
| Duty | S1 |
| Balance grade | G6.3 |
| Vibration standard | JB/T 8689 |
| Service life | 40,000Hours(L10), At 25 °Croom, humidity 15%~65%RH |
| Speed control | Control input 0~10VDC/PWM |
| Control signal | Control signal VSP voltage range1VDC~10VDC(During normal operation, when the VSP voltage is below 1.2VDC, the motor switches from operating mode to standby mode) |
| PWM input | PWM signal: frequency 1K–10KHz, amplitude 10V,duty cycle 10%–100% . |
| Speed feedback | Tach output: 3 Pulse/R; FG internal open circuit output, external pull-up resistor R, pull-up voltage V+ |
| Protection functions | Polarity Protection |
| Rotation | Clockwise,seen on rotor |
Typical applications
- Air handling units (AHU) and rooftop units (RTU)
- Data-center CRAH / CRAC units and fan walls
- Dust extraction and process ventilation
- Fan filter units and air purifiers
Series LWBD3G310: models in the same series share the impeller and motor platform and differ in speed grade, voltage or lead-out / terminal-box configuration — compare them in the table below or ask for the best fit at your duty point.
Nameplate values: maximum airflow is measured at zero static pressure and maximum static pressure at zero airflow; the two never occur together. Confirm the operating point on the performance curve. Final selection is subject to the duty point (airflow / static pressure / voltage / control mode) and project verification.
Alternatives with the same impeller (Ø310 mm · DC)
Same impeller, different speed grade, power or wiring. Step up for more airflow, step down for lower noise.
| Model | Max airflow | Max static pressure | Speed | Power | Noise | Voltage | |
|---|---|---|---|---|---|---|---|
| LWBD3G310-102NH-04 this model | 2,524 m³/h | 530 Pa | 1,970 rpm | 230 W | 75 dB(A) | 48 V | |
| LWBD3G310-102NH-03 | 2,163 m³/h | 510 Pa | 1,900 rpm | 192 W | 73 dB(A) | 48 V | View |
| LWBD3G310-092NZ-05 | 2,235 m³/h | 474 Pa | 1,850 rpm | 160 W | 75 dB(A) | 310 V | View |
| LWBD3G310-092NH-02 | 2,266 m³/h | 391 Pa | 1,600 rpm | 120 W | 72 dB(A) | 48 V | View |
| LWBD3G310-092NM-01 | 2,266 m³/h | 391 Pa | 1,600 rpm | 120 W | 72 dB(A) | 24 V | View |
Not sure which one? Send us the duty point (airflow / static pressure / noise limit) — use the selector or ask an engineer.
Related products
Other models in the LWBD3G310 seriesSame impeller, different speed grade or wiring
Adjacent sizesOne size up when airflow is short, one size down when it is too much
LWBA2D315-188NT-17Ø315 mm · 4,120 m³/h · 1,082 Pa · ACadjacent size
LWBA6E315-102NS-08Ø315 mm · 1,133 m³/h · 185 Pa · ACadjacent size
LWBA4E315-138NS-14Ø315 mm · 2,781 m³/h · 515 Pa · ACadjacent size
LWBA4D315-138NT-15Ø315 mm · 2,318 m³/h · 371 Pa · ACadjacent size
LWBA4D315-138NT-16Ø315 mm · 2,781 m³/h · 515 Pa · ACadjacent size
LWFA4D315-188ST-01Ø315 mm · 5,150 m³/h · 695.25 Pa · ACadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWAD3G300ZS-5PNW-01Ø300 mm · 2,524 m³/h · 185 Pa · DCsimilar duty
LWAD3G300ZB-5PNW-02Ø300 mm · 2,524 m³/h · 185 Pa · DCsimilar duty
LWAD3G300ZS-5PEW-03Ø300 mm · 2,524 m³/h · 185 Pa · DCsimilar duty
LWAD3G300ZB-5PEW-04Ø300 mm · 2,524 m³/h · 185 Pa · DCsimilar duty
LWAD3G300ZS-5PKW-05Ø300 mm · 2,524 m³/h · 185 Pa · DCsimilar duty
LWAD3G300ZB-5PKW-06Ø300 mm · 2,524 m³/h · 185 Pa · DCsimilar dutySee all Backward Curved Centrifugal Fans · select by duty point