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.
- ImpellerØ250 mm
- Max airflow1,483 m³/h
- Max static pressure597 Pa
- Voltage310 V
- Speed2,800 rpm
- Input power110 W
- Noise69 dB(A)
LWBD3G250-072NZ-07 DC Backward Curved Centrifugal Fan Ø250 mm
Ø250 mm | DC | Max airflow 1,483 m³/h | Max static pressure 597 Pa | 69 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.
LWBD3G250-072NZ-07 is a LONGWELL DC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø250 mm, rated 310 V DC, maximum airflow 1,483 m³/h, maximum static pressure 597 Pa, noise 69 dB(A), input power 110 W. The low-voltage brushless DC motor suits battery-powered equipment and electronics cooling with speed control on demand.
Technical data
| Model | LWBD3G250-072NZ-07 |
|---|---|
| Series | LWBD3G250 |
| Motor type | DC |
| Rated voltage | 310 V |
| Current | 0.35 A |
| Input power | 110 W |
| Speed | 2,800 rpm |
| Max. airflow | 1,483 m³/h |
| Max. static pressure | 597 Pa |
| Noise | 69 dB(A) |
| Ambient temperature | -25 ~ 60 °C |
| Impeller diameter | Ø250 mm |
| Rotor diameter | 72 |
| Impeller material | Plastic PA66+25%GF |
| 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 LWBD3G250: 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 (Ø250 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 | |
|---|---|---|---|---|---|---|---|
| LWBD3G250-072NZ-07 this model | 1,483 m³/h | 597 Pa | 2,800 rpm | 110 W | 69 dB(A) | 310 V | |
| LWBD3G250-092NH-05 | 577 m³/h | 1,009 Pa | 3,000 rpm | 150 W | 79 dB(A) | 48 V | View |
| LWDD-250H-MBN-09 | 1,236 m³/h | 577 Pa | 2,638 rpm | 130 W | 72 dB(A) | 48 V | View |
| LWDD-250M-MBN-08 | 1,236 m³/h | 577 Pa | 2,638 rpm | 130 W | 72 dB(A) | 24 V | View |
| LWBD3G250-092NH-06 | 1,442 m³/h | 690 Pa | 3,000 rpm | 160 W | 79 dB(A) | 48 V | View |
| LWAD3G250ZB-7MKW-08 | 1,751 m³/h | 288 Pa | 3,150 rpm | 135 W | 69 dB(A) | 310 V | View |
| LWAD3G250ZS-7MKW-07 | 1,751 m³/h | 288 Pa | 3,150 rpm | 135 W | 69 dB(A) | 310 V | View |
| LWAD3G250ZS-7MEW-05 | 1,751 m³/h | 288 Pa | 3,150 rpm | 135 W | 69 dB(A) | 310 V | View |
| LWAD3G250ZB-7MEW-06 | 1,751 m³/h | 288 Pa | 3,150 rpm | 135 W | 69 dB(A) | 310 V | View |
| LWAD3G250ZS-7MNW-03 | 1,751 m³/h | 288 Pa | 3,150 rpm | 135 W | 69 dB(A) | 310 V | View |
| LWAD3G250ZB-7MNW-04 | 1,751 m³/h | 288 Pa | 3,150 rpm | 135 W | 69 dB(A) | 310 V | View |
| LWAD3G250MS-7MKB-01 | 1,957 m³/h | 227 Pa | 2,780 rpm | 105 W | 69 dB(A) | 24 V | View |
| LWAD3G250HS-7MKB-02 | 1,957 m³/h | 227 Pa | 2,780 rpm | 105 W | 69 dB(A) | 48 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 LWBD3G250 seriesSame impeller, different speed grade or wiring
Adjacent sizesOne size up when airflow is short, one size down when it is too much
LWBE3G270-092NS-02Ø270 mm · 1,545 m³/h · 332 Pa · ECadjacent size
LWBE3G270-092NU-01Ø270 mm · 1,545 m³/h · 332 Pa · ECadjacent size
LWBA2E225-092NS-01Ø225 mm · 618 m³/h · 165 Pa · ACadjacent size
LWFA4D225-138ST-02Ø225 mm · 1,442 m³/h · 288.4 Pa · ACadjacent size
LWBA4E225-092NS-02Ø225 mm · 690 m³/h · 216 Pa · ACadjacent size
LWFA4D225-138NT-01Ø225 mm · 1,648 m³/h · 288.4 Pa · ACadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWBE3G250-072NS-09Ø250 mm · 1,478.05 m³/h · 927 Pa · ECsimilar duty
LWBE3G250-072NU-34Ø250 mm · 1,478.05 m³/h · 927 Pa · ECsimilar duty
LWFE3G250-072PS-04Ø250 mm · 1,478.05 m³/h · 927 Pa · ECsimilar duty
LWDD12-12-ECØ305 mm · 1,489 m³/h · 437 Pa · ECsimilar duty
LWBA2E250-092NS-07Ø250 mm · 1,470 m³/h · 714 Pa · ACsimilar duty
LWBA2E250-092NS-14Ø250 mm · 1,499 m³/h · 773 Pa · ACsimilar dutySee all Backward Curved Centrifugal Fans · select by duty point