ImpellerØ550 mm21.7 in
Max airflow8,755 m³/h5,150 CFM
Voltage380 V
Speed1,540 rpm
Input power725 W
Noise74 dB(A)

LWAA4D550S-5MEB-04 AC Axial Fan Ø550 mm

Ø550 mm | AC | Max airflow 8,755 m³/h | 74 dB(A)

SKU: LWAA4D550S-5MEB-04 Categories: AC Axial Fans, Axial Fans, Impeller Ø500–800 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 catalogueAC ( ) Axial fans( Standard Version) · SKU on PDF p. 23

All files for LWAA4D550S-5MEB-045 files · direct download

PDFFull product catalogue · model on PDF p. 23 WEBPDimensional drawing WEBPPerformance curve WEBPWiring diagram

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

Used in

Heat exchangers & condensers Refrigeration Condensing units Refrigeration condensers 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 · LWAA4D550S-5MEB-04

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WhatsApp / Phone+86 183 5827 4663 E-mail an engineersales@longwellfans.com Files for LWAA4D550S-5MEB-04datasheet · 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 →

Drawing, Curve & Wiring LWAA4D550S-5MEB-04

LWAA4D550S-5MEB-04 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWAA4D550S-5MEB-04 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

LWAA4D550S-5MEB-04 Wiring diagram — **Wiring diagram**Lead colours and terminal assignment; TK = motor thermal contact.

Files for LWAA4D550S-5MEB-04: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.

Technical description LWAA4D550S-5MEB-04

LWAA4D550S-5MEB-04 is a LONGWELL AC Axial Fan from the AC Axial Fans range, impeller Ø550 mm, rated 380 V AC, maximum airflow 8,755 m³/h, noise 74 dB(A), input power 725 W. The fixed-speed AC external-rotor motor is simple, robust and cost-effective for constant-duty applications.

Technical data

Model	LWAA4D550S-5MEB-04
Series	LWAA4D550
Motor type	AC
Phase	3-phase
Rated voltage	380 V
Voltage range	342 ~ 418 V
Frequency	60 Hz
Current	1.4 A
Input power	725 W
Speed	1,540 rpm
Max. airflow	8,755 m³/h
Max. airflow (CFM)	5,150 CFM
Noise	74 dB(A)
Ambient temperature	-30 ~ +60 ℃
Storage temperature	-40 ~ 80℃
Humidity	0 ~ 85 % RH
Altitude	< 1000m
Impeller diameter	Ø550 mm
Impeller material	Cold-rolled sheet ( Impeller )
Protection class	IP54
Insulation class	F
Bearing	Maintenance-free ball bearings
Duty	S1
Balance grade	G6.3
Vibration standard	JB/T 8689
Service life	30,000Hours(L10), At 40 °Croom, humidity 15%~65%RH

Typical applications

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

Series LWAA4D550: 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 LWAA4D550S-5MEB-04

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 (Ø550 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
LWAA4D550S-5MEB-04 this model	8,755 m³/h	see curve	1,540 rpm	725 W	74 dB(A)	380 V
LWAA6E550S-5MEB-05	6,695 m³/h	see curve	900 rpm	320 W	62 dB(A)	220/230 V	View
LWAA6D550S-5MEB-07	6,695 m³/h	see curve	910 rpm	320 W	62 dB(A)	380 V	View
LWAA6E550S-5MEB-06	7,210 m³/h	see curve	1,060 rpm	465 W	66 dB(A)	220/230 V	View
LWAA6D550S-5MEB-08	7,210 m³/h	see curve	1,090 rpm	440 W	66 dB(A)	380 V	View
LWAA4E550B-5MKB-09	8,034 m³/h	see curve	1,320 rpm	550 W	73 dB(A)	220/230 V	View
LWAA4D550S-5MKB-10	8,034 m³/h	194 Pa	1,330 rpm	550 W	73 dB(A)	380 V	View
LWAA4E550S-5MEB-01	8,034 m³/h	see curve	1,320 rpm	550 W	73 dB(A)	220/230 V	View
LWAA4D550S-5MEB-03	8,034 m³/h	see curve	1,330 rpm	550 W	73 dB(A)	380 V	View
LWAA4E550S-5MEB-02	8,755 m³/h	see curve	1,450 rpm	550 W	74 dB(A)	220/230 V	View
LWAA4D550S-5MEW-09	9,116 m³/h	see curve	1,350 rpm	650 W	—	380 V	View