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.
- ImpellerØ355 mm14.0 in
- Max airflow4,017 m³/h2,364 CFM
- Max static pressure618 Pa2.48 in. wg
- Voltage380 V
- Speed1,700 rpm
- Input power550 W
- Noise77 dB(A)
LWBA4D355-138NT-12 AC Backward Curved Centrifugal Fan Ø355 mm
Ø355 mm | AC | Max airflow 4,017 m³/h | Max static pressure 618 Pa | 77 dB(A)
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 18-month warranty
- CE · ETL · RoHS
Downloads for LWBA4D355-138NT-12
PDFDatasheet · 2 MBNeed a non-standard size or another format? Ask an engineer or search the download center.
LWBA4D355-138NT-12 is a LONGWELL AC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø355 mm, rated 380 V AC, maximum airflow 4,017 m³/h, maximum static pressure 618 Pa, noise 77 dB(A), input power 550 W. The fixed-speed AC external-rotor motor is simple, robust and cost-effective for constant-duty applications.
Technical data
| Model | LWBA4D355-138NT-12 |
|---|---|
| Series | LWBA4D355 |
| Motor type | AC |
| Phase | 3-phase |
| Rated voltage | 380 V |
| Frequency | 60 Hz |
| Current | 1.1 A |
| Input power | 550 W |
| Speed | 1,700 rpm |
| Max. airflow | 4,017 m³/h |
| Max. static pressure | 618 Pa |
| Noise | 77 dB(A) |
| Ambient temperature | -40 ~ 65 °C |
| Impeller diameter | Ø355 mm |
| Rotor diameter | 138 |
| Impeller material | Aluminum Alloy |
| Protection class | IP54 |
| 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 LWBA4D355: 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 (Ø355 mm · AC)
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 | |
|---|---|---|---|---|---|---|---|
| LWBA4D355-138NT-12 this model | 4,017 m³/h | 618 Pa | 1,700 rpm | 550 W | 77 dB(A) | 380 V | |
| LWDA-355 (14")U-MWN-03 | 2,130 m³/h | see curve | 1,720 rpm | 260 W | 63 dB(A) | 110-120 V | View |
| LWBA4E355-102NS-16 | 2,636 m³/h | 410 Pa | 1,425 rpm | 203 W | 69.9 dB(A) | 230 V | View |
| LWBA4E355-102NS-15 | 3,035 m³/h | 546 Pa | 1,635 rpm | 268 W | 73.8 dB(A) | 230 V | View |
| LWBA4D355-102NT-10 | 3,245 m³/h | 515 Pa | 1,600 rpm | 270 W | 67 dB(A) | 380 V | View |
| LWEA355S(T)M-159E | 3,265 m³/h | 93 Pa | 1,450 rpm | 370 W | — | 220 V | View |
| LWBA4E355-138NS-13 | 3,399 m³/h | 464 Pa | 1,400 rpm | 400 W | 72 dB(A) | 230 V | View |
| LWBA4D355-138NT-11 | 3,399 m³/h | 464 Pa | 1,450 rpm | 360 W | 72 dB(A) | 380 V | View |
| LWBA4E355-138NS-14 | 4,017 m³/h | 618 Pa | 1,700 rpm | 600 W | 77 dB(A) | 230 V | View |
| LWFA6D355-188NT-02 | 4,172 m³/h | 412 Pa | 900 rpm | 1,150 W | 70 dB(A) | 380 V | View |
| LWBA2D355-188NT-17 | 4,635 m³/h | 1,339 Pa | 2,700 rpm | 1,600 W | 90 dB(A) | 380 V | View |
| LWFA4D355-188NT-01 | 5,665 m³/h | 906.4 Pa | 1,340 rpm | 3,500 W | 80 dB(A) | 380 V | View |
| LWBA2D355-188NT-18 | 5,974 m³/h | 1,339 Pa | 2,700 rpm | 2,500 W | 90 dB(A) | 380 V | View |
| LWDA-355 (14")S-MWN-04 | 6,450 m³/h | see curve | 2,900 rpm | 903 W | 68 dB(A) | 220-240 V | View |
| LWEA355S(T)M-160E | 6,542 m³/h | 373 Pa | 2,900 rpm | 750 W | — | 220 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 LWBA4D355 seriesSame impeller, different speed grade or wiring
LWBA4D355-102NT-05Ø355 mm · 2,524 m³/h · 381 Pa · ACsame series
LWBA4D355-102NT-06Ø355 mm · 2,812 m³/h · 515 Pa · ACsame series
LWBA4D355-102NT-09Ø355 mm · 2,936 m³/h · 464 Pa · ACsame series
LWBA4D355-102NT-10Ø355 mm · 3,245 m³/h · 515 Pa · ACsame series
LWBA4D355-138NT-11Ø355 mm · 3,399 m³/h · 464 Pa · ACsame seriesAdjacent sizesOne size up when airflow is short, one size down when it is too much
LWBA4D315-138NT-15Ø315 mm · 2,318 m³/h · 371 Pa · ACadjacent size
LWBA4E315-102NS-18Ø315 mm · 2,079 m³/h · 399 Pa · ACadjacent size
LWBA2D315-188NT-17Ø315 mm · 4,120 m³/h · 1,082 Pa · ACadjacent size
LWBA4D315-138NT-16Ø315 mm · 2,781 m³/h · 515 Pa · ACadjacent size
LWBA4E315-102NS-19Ø315 mm · 1,859 m³/h · 294 Pa · ACadjacent size
LWBA4E315-138NS-13Ø315 mm · 2,318 m³/h · 371 Pa · ACadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWBA4E355-138NS-14Ø355 mm · 4,017 m³/h · 618 Pa · ACsimilar duty
LWBA6E450-138NS-05Ø450 mm · 4,017 m³/h · 309 Pa · ACsimilar duty
LWBA6D450-138NT-07Ø450 mm · 4,017 m³/h · 309 Pa · ACsimilar duty
LWDE-400 (16")U-MWN-03Ø400 mm · 4,032 m³/h · ECsimilar duty
LWDE-400 (16")U-MWN-01Ø400 mm · 4,032 m³/h · ECsimilar duty
LWCA-1501200SN-06Ø150 mm · 4,000 m³/h · 135 Pa · ACsimilar dutySee all Backward Curved Centrifugal Fans · select by duty point