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.
- ImpellerØ175 mm6.9 in
- Max airflow618 m³/h364 CFM
- Max static pressure515 Pa2.07 in. wg
- Voltage24 V
- Speed3,900 rpm
- Input power75 W
- Noise71 dB(A)
LWBD3G175-072NM-02 DC Backward Curved Centrifugal Fan Ø175 mm
Ø175 mm | DC | Max airflow 618 m³/h | Max static pressure 515 Pa | 71 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.
LWBD3G175-072NM-02 is a LONGWELL DC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø175 mm, rated 24 V DC, maximum airflow 618 m³/h, maximum static pressure 515 Pa, noise 71 dB(A), input power 75 W. The low-voltage brushless DC motor suits battery-powered equipment and electronics cooling with speed control on demand.
Technical data
| Model | LWBD3G175-072NM-02 |
|---|---|
| Series | LWBD3G175 |
| Motor type | DC |
| Rated voltage | 24 V |
| Current | 3.2 A |
| Input power | 75 W |
| Speed | 3,900 rpm |
| Max. airflow | 618 m³/h |
| Max. airflow (CFM) | 364 CFM |
| Max. static pressure | 515 Pa |
| Noise | 71 dB(A) |
| Ambient temperature | -25 ~ 60 °C |
| Storage temperature | -25 ~ 60℃ |
| Humidity | 5 ~ 90 % RH |
| Altitude | < 1000m |
| Impeller diameter | Ø175 mm |
| Rotor diameter | 72 |
| Impeller material | PA6+GF( Impeller ) |
| Protection class | IP42 |
| Insulation class | F |
| 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: 2 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 LWBD3G175: 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 (Ø175 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 | |
|---|---|---|---|---|---|---|---|
| LWBD3G175-072NM-02 this model | 618 m³/h | 515 Pa | 3,900 rpm | 75 W | 71 dB(A) | 24 V | |
| LWBD3G175-072NH-03 | 618 m³/h | 515 Pa | 3,900 rpm | 75 W | 71 dB(A) | 48 V | View |
| LWBD3G175-072NM-04 | 670 m³/h | 319 Pa | 2,800 rpm | 50 W | 68 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 LWBD3G175 seriesSame impeller, different speed grade or wiring
Adjacent sizesOne size up when airflow is short, one size down when it is too much
LWFE3G180-092SS-02Ø180 mm · 927 m³/h · 824 Pa · ECadjacent size
LWBA2E180-092NS-03Ø180 mm · 443 m³/h · 335 Pa · ACadjacent size
LWFD3G180-092SZ-01Ø180 mm · 762 m³/h · 700 Pa · DCadjacent size
LWFD3G180-092SH-01Ø180 mm · 618 m³/h · 618 Pa · DCadjacent size
LWFE3G180-092SS-01Ø180 mm · 948 m³/h · 639 Pa · ECadjacent size
LWFE3G180-102DS-01Ø180 mm · 2,060 m³/h · 742 Pa · ECadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
See all Backward Curved Centrifugal Fans · select by duty point