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 airflow1,236 m³/h
- Max static pressure577 Pa
- Voltage48 V
- Speed2,638 rpm
- Input power130 W
- Noise72 dB(A)
LWDD-250H-MBN-09 DC Metal Inline Duct Fan Ø250 mm
Ø250 mm | DC | Max airflow 1,236 m³/h | Max static pressure 577 Pa | 72 dB(A)
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 18-month warranty
- CE · ETL · RoHS
Downloads for LWDD-250H-MBN-09
PDFDatasheet · 519 KBNeed a non-standard size or another format? Ask an engineer or search the download center.
LWDD-250H-MBN-09 is a LONGWELL DC Metal Inline Duct Fan from the Metal Inline Duct Fans range, impeller Ø250 mm, rated 48 V DC, maximum airflow 1,236 m³/h, maximum static pressure 577 Pa, noise 72 dB(A), input power 130 W. The low-voltage brushless DC motor suits battery-powered equipment and electronics cooling with speed control on demand.
Technical data
| Model | LWDD-250H-MBN-09 |
|---|---|
| Series | LWDD250 |
| Motor type | DC |
| Rated voltage | 48 V |
| Current | 2.5 A |
| Input power | 130 W |
| Speed | 2,638 rpm |
| Max. airflow | 1,236 m³/h |
| Max. static pressure | 577 Pa |
| Noise | 72 dB(A) |
| Impeller diameter | Ø250 mm |
| Inlet diameter | 250mm |
| Impeller material | Plastic |
Typical applications
- Residential and commercial fresh-air systems
- Kitchen and bathroom exhaust
- Local pressurisation and booster duty
- Hotel and office ventilation
Series LWDD250: 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 | |
|---|---|---|---|---|---|---|---|
| LWDD-250H-MBN-09 this model | 1,236 m³/h | 577 Pa | 2,638 rpm | 130 W | 72 dB(A) | 48 V | |
| LWBD3G250-092NH-05 | 577 m³/h | 1,009 Pa | 3,000 rpm | 150 W | 79 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 |
| LWBD3G250-072NZ-07 | 1,483 m³/h | 597 Pa | 2,800 rpm | 110 W | 69 dB(A) | 310 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 LWDD250 seriesSame impeller, different speed grade or wiring
Adjacent sizesOne size up when airflow is short, one size down when it is too much
LWDE-200 (8")S-MWN-04Ø200 mm · 1,310 m³/h · ECadjacent size
LWDE-200 (8")S-MWN-02Ø200 mm · 1,310 m³/h · ECadjacent size
LWDE-300 (12")U-MWN-01Ø300 mm · 1,763 m³/h · ECadjacent sizeLWDE-300 (12")S-MWN-02Ø300 mm · 3,500 m³/h · ECadjacent size
LWDA-200(8")S-PWN-09Ø200 mm · 910 m³/h · 384 Pa · ACadjacent size
LWDA-300 (12")S-MWN-04Ø300 mm · 3,150 m³/h · ACadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWAD3G200MS-7MKB-01Ø200 mm · 1,236 m³/h · 278 Pa · DCsimilar duty
LWAD3G200HS-7MKB-02Ø200 mm · 1,236 m³/h · 278 Pa · DCsimilar duty
LWFD3G146-092DZ-03Ø146 mm · 1,236 m³/h · 525.3 Pa · DCsimilar duty
LWFA4D200-102NT-01Ø200 mm · 1,236 m³/h · 226.6 Pa · ACsimilar duty
LWFA4E200-102NS-02Ø200 mm · 1,236 m³/h · 226.6 Pa · ACsimilar duty
LWBE3G250-072NS-18Ø250 mm · 1,236 m³/h · 515 Pa · ECsimilar dutySee all Impeller Ø160–315 mm · select by duty point