EC Axial Fan — series representative image for LWAE3G250SS-7MEW-03

Representative image of the series — dimensions and configuration of this model are given in the drawing and data table below.

ImpellerØ250 mm9.8 in
Max airflow1,751 m³/h1,124 CFM
Max static pressure290 Pa1.16 in. wg
Voltage220/230 V
Speed3,150 rpm
Input power170 W
Noise69 dB(A)

LWAE3G250SS-7MEW-03 EC Axial Fan Ø250 mm

Ø250 mm | EC | Max airflow 1,751 m³/h | Max static pressure 290 Pa | 69 dB(A)

SKU: LWAE3G250SS-7MEW-03 Categories: Axial Fans, EC Axial Fans, Impeller Ø200–250 mm

Direct from LONGWELL
OEM / ODM
Samples in 1–3 days
Production 15–30 days
12-month warranty
CE · RoHS · ETL on request

PDFDatasheet (PDF)electrical & performance dataPDFFull product catalogueEC EC Axial fans · SKU on PDF p. 13

All files for LWAE3G250SS-7MEW-036 files · direct download

PDFFull product catalogue · model on PDF p. 13 WEBPDimensional drawing WEBPPerformance curve WEBPWiring diagram DOCXDatasheet

CAD models (STEP / DWG) are released on request — see “Engineering files” below. Another format or a non-standard variant? Ask an engineer · download center

Cross-reference: same impeller size class as ebm-papst W3G250 — side-by-side comparison on longwellfans.com. Mounting is confirmed against the LONGWELL drawing before ordering.

Used in

Heat pumps Hybrid heat-pump systems Adiabatic cooling Process cooling All industries →

Proven in projects

Heat pump fan programme Telecom & power cabinet cooling Cold chain supermarket retrofit Dry-type transformer cooling All case studies →

Get a quote · LWAE3G250SS-7MEW-03

Price, curve check and lead time within 1 business day.

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WhatsApp / Phone+86 183 5827 4663 E-mail an engineersales@longwellfans.com Files for LWAE3G250SS-7MEW-03datasheet · catalogue · drawings · curves — listed above

Samples 1–3 days · fee credited to your order
Typically 50–200 pcs · ~30 pcs for a first validation order
T/T 30 / 70 · FOB / CIF / DDP
Released to LONGWELL standards · 12-month warranty
How ordering works →

Performance curve (P-Q) LWAE3G250SS-7MEW-03

Required airflow Required static pressure

Digitised from the catalogue curve at standard air (20 °C, 101.3 kPa, 1.2 kg/m³); one curve per voltage / speed grade (3 here, rated 220/230 V). Data version: catalogue curve re-digitised 2026-09-20 (axis-calibrated, cross-checked). 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.

Video LWAE3G250SS-7MEW-03

Longwell EC Axial Fan – Energy-Efficient, Embrace a Fresh Future | LWAE3G250SS-7MKW-11 · open in video library

LWAE3G250 Series Axial Fan: Efficient DC Ventilation Solution | LWAE3G250SS-7MKW-11 · open in video library

Drawing, Curve & Wiring LWAE3G250SS-7MEW-03

LWAE3G250SS-7MEW-03 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWAE3G250SS-7MEW-03 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

LWAE3G250SS-7MEW-03 Wiring diagram — **Wiring diagram**Lead colours and terminal assignment; TK = motor thermal contact.

Files for LWAE3G250SS-7MEW-03: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.

Technical description LWAE3G250SS-7MEW-03

LWAE3G250SS-7MEW-03 is a LONGWELL EC Axial Fan from the EC Axial Fans range, impeller Ø250 mm, rated 220/230 V EC, maximum airflow 1,751 m³/h, maximum static pressure 290 Pa, noise 69 dB(A), input power 170 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	LWAE3G250SS-7MEW-03
Series	LWAE3G250
Motor type	EC
Phase	1-phase
Rated voltage	220/230 V
Voltage range	176 ~ 264 V
Frequency	50/60 Hz
Current	0.9 A
Input power	170 W
Speed	3,150 rpm
Max. airflow	1,751 m³/h
Max. airflow (CFM)	1,124 CFM
Max. static pressure	290 Pa
Noise	69 dB(A)
Ambient temperature	-25 ~ +60 ℃
Storage temperature	-25 ~ 70℃
Humidity	0 ~ 85 % RH
Altitude	< 1000m
Impeller diameter	Ø250 mm
Impeller material	Sheet steel ( Impeller )
Protection class	IP54
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 40 °Croom, humidity 15%~65%RH
Net weight	2.8
Speed control	Control input 0~10VDC or PWM
Control signal	Control signal VSP voltage range1VDC~9.5VDC(During normal operation, when the VSP voltage is below 1.0VDC, the motor switches from operating mode to standby mode)
PWM input	PWM signal: frequency 1K–10KHz, amplitude 10–12V,duty cycle 30%–70% .
Speed feedback	Tach output: 1 Pulse/R; FG internal open circuit output, external pull-up resistor 10KΩ, pull-up voltage +10V
Auxiliary output	Output 10VDC, Max Current 10 mA
Protection functions	Over-temperature protection, Over-current protection, Locked-rotor protection’
Soft start	Delay time <20 seconds to full speed

Typical applications

Condensers, evaporators and dry coolers
Heat-pump and chiller outdoor units
Building and workshop ventilation
Cooling towers and transformer cooling

Series LWAE3G250: 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.

Company certificates

Scans of original documents held by Ningbo Longwell Electric Technology Co., Ltd.: the company ISO 9001 / 14001 / 45001 management-system certificate. Click a scan to open the original.

ISO 9001 / 14001 / 45001Management systems of Ningbo Longwell Electric Technology Co., Ltd. (company certificate).

ISO 9001 / 14001 / 45001 management system certificate — LONGWELL certificate

PDFISO 9001 / 14001 / 45001 management system certificate

Need a Declaration of Conformity for this model and your destination market? Ask us — we arrange additional certification on request.

How to order LWAE3G250SS-7MEW-03

Most first orders follow the same eight steps. Quantities, terms and lead times are confirmed in your quotation.

1SelectFind models by duty point in the selector or by model number, compare on the curve and add them to your RFQ list.
2Engineering checkWithin 1 business day you receive the duty-point check on the curve, price and lead time.
3SamplesStock models ship in 1–3 days.
4Validation supportDatasheets, drawings, wiring diagrams and DoC per model; test reports, CAD and register maps after a short project check or NDA.
5Order & paymentProforma invoice; first orders on T/T 30 / 70.
6Production & release15–30 days at the partner factory that builds your model, then inspected and released to LONGWELL standards with outgoing sampling to AQL 2.5.
7ShippingFOB / CIF / DDP by sea from Ningbo or Shanghai; express and air on EXW / FCA / DAP.
8After-sales12 months standard, extendable to 18–24 months by project agreement; test records retained for 5 years; 8D closed-loop for any issue; annual technical review for framework customers.

See terms, QC and FAQ →

Test & release at LONGWELL

Specified and drawn by LONGWELL; built to LONGWELL drawings by qualified partner factories; inspected and released to LONGWELL standards before shipment.

See test and release photos (8)

LONGWELL Semi-anechoic chamber — Semi-anechoic chamber

LONGWELL Test laboratory — Test laboratory

Test labs and all certificate scans →

Alternatives with the same impeller (Ø250 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
LWAE3G250SS-7MEW-03 this model	1,751 m³/h	290 Pa	3,150 rpm	170 W	69 dB(A)	220/230 V
LWAE3G250SS-7PNW-07	1,627 m³/h	214 Pa	2,480 rpm	85 W	60 dB(A)	220/230 V	View
LWAE3G250SS-7PKW-08	1,627 m³/h	214 Pa	2,480 rpm	85 W	60 dB(A)	220/230 V	View
LWAE3G250ST-7MNW-02	1,751 m³/h	290 Pa	3,150 rpm	135 W	69 dB(A)	220/230 V	View
LWAE3G250ST-7MGW-06	1,751 m³/h	290 Pa	3,150 rpm	135 W	69 dB(A)	220/230 V	View
LWAE3G250ST-7MEW-04	1,751 m³/h	290 Pa	3,150 rpm	135 W	69 dB(A)	220/230 V	View
LWAE3G250SS-7MNW-01	1,751 m³/h	290 Pa	3,150 rpm	135 W	69 dB(A)	220/230 V	View
LWAE3G250SS-7MGW-05	1,751 m³/h	290 Pa	3,150 rpm	135 W	69 dB(A)	220/230 V	View
LWAE3G250SS-7PNW-09	1,916 m³/h	205 Pa	2,950 rpm	115 W	60 dB(A)	220/230 V	View
LWAE3G250SS-7PKW-10	1,916 m³/h	201 Pa	2,950 rpm	115 W	68 dB(A)	220/230 V	View