Digitised from the catalogue curve at standard air (20 °C, 101.3 kPa, 1.2 kg/m³); one curve per voltage / speed grade (1 here, rated 400 V). Data version: catalogue 2026-08. 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.
- ImpellerØ400 mm15.7 in
- Max airflow7,459 m³/h4,388 CFM
- Max static pressure840 Pa3.37 in. wg
- Voltage400 V
- Speed2,060 rpm
- Input power1,100 W1.47 hp
- Noise77 dB(A)
LWBE3G400-138PT-04 EC Plug Fan Ø400 mm
Ø400 mm | EC | Max airflow 7,459 m³/h | Max static pressure 840 Pa | 77 dB(A)
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 12-month warranty
- CE · RoHS · ETL on request
All files for LWBE3G400-138PT-045 files · direct download
CAD models (STEP / DWG) are released on request — see “Engineering files” below. Another format or a non-standard variant? Ask an engineer · download center
Proven in: AHU & ventilation unit fans · CRAH FanGrid retrofit · Heat pump fan programme — all case studies on longwellfans.com
Cross-reference: same impeller size class as ebm-papst K3G400, ebm-papst R3G400, ebm-papst RadiPac 400, Ziehl-Abegg RH40C — side-by-side comparison on longwellfans.com. Mounting is confirmed against the LONGWELL drawing before ordering.
Typical applications: Industrial AHUs · Air conditioning · Air handling units · FanGrid arrays — all industries
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.
LONGWELL 400mm EC Backward Curved Centrifugal Fan for AHU & HVAC Systems | LWBE3G400 · open in video library
Longwell Centrifugal Fans: Efficient and Quiet, Leading New Industry Trends | LWBE3G400-102NS-22 · open in video library
Need a non-standard size or another format? Ask an engineer or search the download center.
LWBE3G400-138PT-04 is a LONGWELL EC Plug Fan from the Plug Fans (RLM Plenum Fans) range, impeller Ø400 mm, rated 400 V EC, maximum airflow 7,459 m³/h, maximum static pressure 840 Pa, noise 77 dB(A), input power 1,100 W. The EC motor integrates the drive electronics: stepless speed control by 0–10 V or PWM signal, speed feedback and high efficiency at part load.
Technical data
| Model | LWBE3G400-138PT-04 |
|---|---|
| Series | LWBE3G400 |
| Motor type | EC |
| Phase | 3-phase |
| Rated voltage | 400 V |
| Frequency | 50 Hz |
| Current | 2.4 A |
| Input power | 1,100 W |
| Speed | 2,060 rpm |
| Max. airflow | 7,459 m³/h |
| Max. airflow (CFM) | 4,388 CFM |
| Max. static pressure | 840 Pa |
| Noise | 77 dB(A) |
| Ambient temperature | -25 ~ 60 °C |
| Storage temperature | -25 ~ 70℃ |
| Humidity | 0 ~ 85% RH |
| Altitude | < 1000m |
| Impeller diameter | Ø400 mm |
| Rotor diameter | 138 mm |
| Impeller material | Aluminum Alloy (Impeller) |
| Protection class | IP54 |
| 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 40℃room, humidity 15%~65%RH |
| Speed control | Control input 0~10VDC(RS485 external control box can be connected) |
| Control signal | Control signal VSP voltage range 1.5±0.1VDC~9.5±0.2VDC(During normal operation, when the VSP voltage is below 0.9±0.1VDC, the motor switches from operating mode to standby mode) |
| Speed feedback | Tach output: 15 Pulse/R; FG internal open circuit output, external pull-up resistor R, pull-up voltage V+ |
| Auxiliary output | Output 10±0.3VDC, Max Current: 10mA |
| Communication | LWRS485-04 |
| Protection functions | Current limiting protection, Over-temperature protection, Over-current protectionLocked-rotor protection, Input power supply lacks phase protection |
| Soft start | Delay time <35 seconds to full speed |
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 LWBE3G400: 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 (Ø400 mm · EC)
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 | |
|---|---|---|---|---|---|---|---|
| LWBE3G400-138PT-04 this model | 7,459 m³/h | 840 Pa | 2,060 rpm | 1,100 W | 77 dB(A) | 400 V | |
| LWBE3G400-102PS-11 | 3,554 m³/h | 546 Pa | 1,460 rpm | 300 W | 76 dB(A) | 230 V | View |
| LWBE3G400-102NS-16 | 3,554 m³/h | 546 Pa | 1,460 rpm | 300 W | 76 dB(A) | 230 V | View |
| LWBE3G400-102PS-01 | 3,914 m³/h | 556 Pa | 1,430 rpm | 330 W | 70 dB(A) | 230 V | View |
| LWBE3G400-102NS-02 | 3,914 m³/h | 556.2 Pa | 1,430 rpm | 330 W | 70 dB(A) | 230 V | View |
| LWBE3G400-102PS-09 | 4,463 m³/h | 420 Pa | 1,250 rpm | 297 W | — | 230 V | View |
| LWBE3G400-102NS-14 | 4,463 m³/h | 420 Pa | 1,250 rpm | 297 W | 62 dB(A) | 230 V | View |
| LWBE3G400-102NS-15 | 5,476 m³/h | 600 Pa | 1,520 rpm | 500 W | 68 dB(A) | 230 V | View |
| LWBE3G400-102PS-10 | 5,615 m³/h | 622 Pa | 1,520 rpm | 500 W | — | 230 V | View |
| LWBE3G400-102NS-11 | 6,489 m³/h | 978.5 Pa | 1,800 rpm | 700 W | 85 dB(A) | 230 V | View |
| LWBE3G400-138NT-12 | 7,459 m³/h | 840 Pa | 1,100 rpm | 1,480 W | 71 dB(A) | 400 V | View |
| LWBE3G400-188PT-07 | 9,682 m³/h | 1,627 Pa | 2,650 rpm | 2,060 W | 84 dB(A) | 400 V | View |
| LWBE3G400-188NT-17 | 9,682 m³/h | 1,627 Pa | 2,650 rpm | 2,060 W | 84 dB(A) | 400 V | View |
Not sure which one? Send us the duty point (airflow / static pressure / noise limit) — use the selector or ask an engineer.
Other models in the LWBE3G400 seriesSame impeller, different speed grade or wiring
LWBE3G400-102NS-11Ø400 mm · 6,489 m³/h · 978.5 Pa · ECsame series
LWBE3G400-102NS-02Ø400 mm · 3,914 m³/h · 556.2 Pa · ECsame series
LWBE3G400-102NS-14Ø400 mm · 4,463 m³/h · 420 Pa · ECsame series
LWBE3G400-102NS-15Ø400 mm · 5,476 m³/h · 600 Pa · ECsame series
LWBE3G400-102NS-16Ø400 mm · 3,554 m³/h · 546 Pa · ECsame series
LWBE3G400-138NT-12Ø400 mm · 7,459 m³/h · 840 Pa · ECsame seriesAdjacent sizesOne size up when airflow is short, one size down when it is too much
LWBE3G355-092PS-15Ø355 mm · 2,472 m³/h · 350 Pa · ECadjacent size
LWBE3G355-102PS-18Ø355 mm · 3,915 m³/h · 770 Pa · ECadjacent size
LWBE3G355-102PS-17Ø355 mm · 3,142 m³/h · 670 Pa · ECadjacent size
LWBE3G355-102PS-16Ø355 mm · 3,554 m³/h · 618 Pa · ECadjacent size
LWBE3G355-138PT-05Ø355 mm · 7,045 m³/h · 830 Pa · ECadjacent size
LWBE3G355-102NS-15Ø355 mm · 3,915 m³/h · 770 Pa · ECadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWBE3G450-102NS-19Ø450 mm · 7,467.5 m³/h · 1,030 Pa · ECsimilar duty
LWBE3G450-188NT-15Ø450 mm · 7,425 m³/h · 1,568 Pa · ECsimilar duty
LWBE3G450-188PT-07Ø450 mm · 7,425 m³/h · 1,568 Pa · ECsimilar duty
LWFA8D450-188NT-02Ø450 mm · 7,416 m³/h · 370.8 Pa · ACsimilar dutyLWWAF-5.6A-0.37-6P-1-0027,410 m³/h · ACsimilar dutySee all Centrifugal Fans · select by duty point