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.
- ImpellerØ400 mm15.7 in
- Max airflow3,059 m³/h1,800 CFM
- Max static pressure433 Pa1.74 in. wg
- Voltage48 V
- Speed1,260 rpm
- Input power190 W
- Noise73 dB(A)
LWBD3G400-102NH-03 DC Backward Curved Centrifugal Fan Ø400 mm
Ø400 mm | DC | Max airflow 3,059 m³/h | Max static pressure 433 Pa | 73 dB(A)
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 18-month warranty
- CE · ETL · RoHS
Downloads for LWBD3G400-102NH-03
PDFDatasheet · 1.9 MBNeed a non-standard size or another format? Ask an engineer or search the download center.
LWBD3G400-102NH-03 is a LONGWELL DC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø400 mm, rated 48 V DC, maximum airflow 3,059 m³/h, maximum static pressure 433 Pa, noise 73 dB(A), input power 190 W. The low-voltage brushless DC motor suits battery-powered equipment and electronics cooling with speed control on demand.
Technical data
| Model | LWBD3G400-102NH-03 |
|---|---|
| Series | LWBD3G400 |
| Motor type | DC |
| Rated voltage | 48 V |
| Current | 4 A |
| Input power | 190 W |
| Speed | 1,260 rpm |
| Max. airflow | 3,059 m³/h |
| Max. static pressure | 433 Pa |
| Noise | 73 dB(A) |
| Ambient temperature | -25 ~ 60 °C |
| Impeller diameter | Ø400 mm |
| Rotor diameter | 102 |
| Impeller material | Sheet Aluminum |
| Protection class | IP44 |
| Insulation class | F |
| Bearing | Maintenance-free ball bearings |
| Duty | S1 |
| 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 LWBD3G400: 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.
Related products
Adjacent sizesOne size up when airflow is short, one size down when it is too much
LWBE3G355-102NS-21Ø355 mm · 3,141.5 m³/h · 669.5 Pa · ECadjacent size
LWFE3G355-102PT-10Ø355 mm · 6,180 m³/h · 1,751 Pa · ECadjacent size
LWBE3G355-092NS-19Ø355 mm · 2,472 m³/h · 350.2 Pa · ECadjacent size
LWBE3G355-102NS-20Ø355 mm · 3,554 m³/h · 618 Pa · ECadjacent size
LWBE3G355-092PS-15Ø355 mm · 2,472 m³/h · 350 Pa · ECadjacent size
LWBD3G355-102NH-04Ø355 mm · 2,421 m³/h · 499 Pa · DCadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWBE3G280-102NS-19Ø280 mm · 3,039 m³/h · 1,102 Pa · ECsimilar duty
LWFE3G225-102DS-02Ø225 mm · 3,039 m³/h · 484 Pa · ECsimilar duty
LWBE3G280-102PS-19Ø280 mm · 3,039 m³/h · 1,102 Pa · ECsimilar duty
LWBE3G250-102NS-20Ø250 mm · 3,038.5 m³/h · 1,442 Pa · ECsimilar duty
LWFE3G250-102PS-07Ø250 mm · 3,038.5 m³/h · 1,442 Pa · ECsimilar duty
LWBA4E355-102NS-15Ø355 mm · 3,035 m³/h · 546 Pa · ACsimilar dutySee all Backward Curved Centrifugal Fans · select by duty point