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 airflow1,957 m³/h
- Max static pressure227 Pa
- Voltage24 V
- Speed2,780 rpm
- Input power105 W
- Noise69 dB(A)
LWAD3G250MS-7MKB-01 DC Axial Fan Ø250 mm
Ø250 mm | DC | Max airflow 1,957 m³/h | Max static pressure 227 Pa | 69 dB(A)
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 18-month warranty
- CE · ETL · RoHS
Engineering files (on request)
CAD files exist for this model and can be released for assembly checks in SolidWorks / CATIA / Creo / Inventor.
CAD models contain the blade geometry and are not downloadable. Tell us the project; an engineer sends the file after a short check, normally within 1 business day.
Need a non-standard size or another format? Ask an engineer or search the download center.
LWAD3G250MS-7MKB-01 is a LONGWELL DC Axial Fan from the DC Axial Fans range, impeller Ø250 mm, rated 24 V DC, maximum airflow 1,957 m³/h, maximum static pressure 227 Pa, noise 69 dB(A), input power 105 W. The low-voltage brushless DC motor suits battery-powered equipment and electronics cooling with speed control on demand.
Technical data
| Model | LWAD3G250MS-7MKB-01 |
|---|---|
| Series | LWAD3G250 |
| Motor type | DC |
| Rated voltage | 24 V |
| Frequency | 50 Hz |
| Current | 4.4 A |
| Input power | 105 W |
| Speed | 2,780 rpm |
| Max. airflow | 1,957 m³/h |
| Max. airflow (CFM) | 1,151 CFM |
| Max. static pressure | 227 Pa |
| Noise | 69 dB(A) |
| Ambient temperature | -25 ~ 60 °C |
| Storage temperature | -25 ~ 60℃ |
| Humidity | 5 ~ 90 % RH |
| Altitude | < 1000m |
| Impeller diameter | Ø250 mm |
| Impeller material | Galvanised sheet steel ( Impeller ) Cast aluminium (Housing) |
| 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: 4 Pulse/R; FG internal open circuit output, external pull-up resistor R, pull-up voltage V+ |
| Protection functions | Polarity Protection |
Typical applications
- Condensers, evaporators and dry coolers
- Heat-pump and chiller outdoor units
- Building and workshop ventilation
- Cooling towers and transformer cooling
Series LWAD3G250: 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 | |
|---|---|---|---|---|---|---|---|
| LWAD3G250MS-7MKB-01 this model | 1,957 m³/h | 227 Pa | 2,780 rpm | 105 W | 69 dB(A) | 24 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 |
| 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 |
| 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 LWAD3G250 seriesSame impeller, different speed grade or wiring
LWAD3G250HS-7MKB-02Ø250 mm · 1,957 m³/h · 227 Pa · DCsame series
LWAD3G250ZS-7MNW-03Ø250 mm · 1,751 m³/h · 288 Pa · DCsame series
LWAD3G250ZB-7MNW-04Ø250 mm · 1,751 m³/h · 288 Pa · DCsame series
LWAD3G250ZS-7MEW-05Ø250 mm · 1,751 m³/h · 288 Pa · DCsame series
LWAD3G250ZB-7MEW-06Ø250 mm · 1,751 m³/h · 288 Pa · DCsame series
LWAD3G250ZS-7MKW-07Ø250 mm · 1,751 m³/h · 288 Pa · DCsame seriesAdjacent sizesOne size up when airflow is short, one size down when it is too much
LWA-250S(T)M-04EØ240 mm · 2,700 m³/h · 300 Pa · ACadjacent size
LWMFAF265-01Ø265 mm · 2,400 m³/h · 750 Pa · ACadjacent size
LWAA2D230S-5MNW-01Ø230 mm · 1,288 m³/h · ACadjacent size
LWAA2D230S-5MNW-02Ø230 mm · 1,391 m³/h · ACadjacent size
LWEA280S(T)M-156EØ280 mm · 3,202 m³/h · 232 Pa · ACadjacent size
LWEA280S(T)M-155EØ280 mm · 1,605 m³/h · 60 Pa · ACadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWFE3G250-102SS-01Ø250 mm · 1,957 m³/h · 422 Pa · ECsimilar duty
LWBA4E315-102NS-04Ø315 mm · 1,957 m³/h · 412 Pa · ACsimilar duty
LWBA4E315-102NS-05Ø315 mm · 1,957 m³/h · 309 Pa · ACsimilar duty
LWBA4D315-102NT-09Ø315 mm · 1,957 m³/h · 309 Pa · ACsimilar duty
LWBA4E315-102NS-11Ø315 mm · 1,957 m³/h · 319 Pa · ACsimilar dutySee all Axial Fans · select by duty point