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.
- ImpellerØ133 mm5.2 in
- Max airflow386 m³/h227 CFM
- Max static pressure335 Pa1.34 in. wg
- Voltage48 V
- Speed3,900 rpm
- Input power28 W
- Noise65 dB(A)
LWBD3G133-072NH-03 DC Backward Curved Centrifugal Fan Ø133 mm
Ø133 mm | DC | Max airflow 386 m³/h | Max static pressure 335 Pa | 65 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.
LWBD3G133-072NH-03 is a LONGWELL DC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø133 mm, rated 48 V DC, maximum airflow 386 m³/h, maximum static pressure 335 Pa, noise 65 dB(A), input power 28 W. The low-voltage brushless DC motor suits battery-powered equipment and electronics cooling with speed control on demand.
Technical data
| Model | LWBD3G133-072NH-03 |
|---|---|
| Series | LWBD3G133 |
| Motor type | DC |
| Rated voltage | 48 V |
| Current | 0.58 A |
| Input power | 28 W |
| Speed | 3,900 rpm |
| Max. airflow | 386 m³/h |
| Max. airflow (CFM) | 227 CFM |
| Max. static pressure | 335 Pa |
| Noise | 65 dB(A) |
| Ambient temperature | -25 ~ 60 °C |
| Storage temperature | -25 ~ 60℃ |
| Humidity | 5 ~ 90 % RH |
| Altitude | < 1000m |
| Impeller diameter | Ø133 mm |
| Rotor diameter | 72 |
| Impeller material | PA6+GF( Impeller ) |
| Protection class | IP42 |
| 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: 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 LWBD3G133: 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 (Ø133 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 | |
|---|---|---|---|---|---|---|---|
| LWBD3G133-072NH-03 this model | 386 m³/h | 335 Pa | 3,900 rpm | 28 W | 65 dB(A) | 48 V | |
| LWFD3G133-072SZ-01 | 319 m³/h | 319 Pa | 2,100 rpm | 65 W | 59 dB(A) | 310 V | View |
| LWFD3G133-072SH-01 | 319 m³/h | 258 Pa | 2,040 rpm | 48 W | 63 dB(A) | 48 V | View |
| LWFD3G133-072SM-01 | 319 m³/h | 258 Pa | 2,040 rpm | 48 W | 63 dB(A) | 24 V | View |
| LWBD3G133-072NM-02 | 386 m³/h | 335 Pa | 3,900 rpm | 28 W | 65 dB(A) | 24 V | View |
| LWFD3G133-092DZ-02 | 679.8 m³/h | 329.6 Pa | 1,550 rpm | 80 W | 69 dB(A) | 310 V | View |
| LWFD3G133-092DZ-01 | 679.8 m³/h | 329.6 Pa | 1,550 rpm | 80 W | 69 dB(A) | 310 V | View |
| LWFD3G133-072DH-02 | 721 m³/h | 515 Pa | 1,780 rpm | 105 W | 62 dB(A) | 48 V | View |
| LWFD3G133-072DM-02 | 721 m³/h | 515 Pa | 1,780 rpm | 105 W | 62 dB(A) | 24 V | View |
| LWFD3G133-092DH-01 | 772.5 m³/h | 293.55 Pa | 1,750 rpm | 110 W | 66 dB(A) | 48 V | View |
| LWFD3G133-092DM-01 | 772.5 m³/h | 293.55 Pa | 1,750 rpm | 110 W | 66 dB(A) | 24 V | View |
| LWFD3G133-092DH-03 | 978.5 m³/h | 484.1 Pa | 1,560 rpm | 120 W | 68 dB(A) | 48 V | View |
| LWFD3G133-092DM-03 | 978.5 m³/h | 484.1 Pa | 1,560 rpm | 120 W | 68 dB(A) | 24 V | View |
| LWFD3G133-072DM-04 | 1,112.4 m³/h | 597.4 Pa | 1,580 rpm | 118 W | 64 dB(A) | 24 V | View |
| LWFD3G133-072DH-04 | 1,112.4 m³/h | 597.4 Pa | 1,580 rpm | 118 W | 64 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 LWBD3G133 seriesSame impeller, different speed grade or wiring
Adjacent sizesOne size up when airflow is short, one size down when it is too much
LWFE3G140-072SS-02Ø140 mm · 505 m³/h · 881 Pa · ECadjacent size
LWFD3G140-072SH-01Ø140 mm · 464 m³/h · 453 Pa · DCadjacent size
LWFE3G140-072SS-04Ø140 mm · 597 m³/h · 979 Pa · ECadjacent size
LWFD3G140-072SM-02Ø140 mm · 464 m³/h · 453 Pa · DCadjacent size
LWFE3G140-072SS-01Ø140 mm · 453 m³/h · 783 Pa · ECadjacent size
LWFE3G140-072NS-02Ø140 mm · 494 m³/h · 845 Pa · ECadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWDE-125S-MBN-06Ø125 mm · 386 m³/h · 839 Pa · ECsimilar duty
LWDE3G100-IS-01Ø98 mm · 385 m³/h · 269 Pa · ECsimilar duty
LWDE3G100-IS-03Ø98 mm · 385 m³/h · 269 Pa · ECsimilar duty
LWFA2E120-092DS-04Ø120 mm · 391 m³/h · 402 Pa · ACsimilar duty
LWFA2E120-092DS-06Ø120 mm · 391 m³/h · 443 Pa · ACsimilar dutySee all Backward Curved Centrifugal Fans · select by duty point