DC Centrifugal Blower performance curve (shared by several models)

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

Frame size75 mm3.0 in
Max airflow9 m³/h5 CFM
Max static pressure109 Pa0.44 in. wg
Voltage12 V
Speed3,000 rpm
Input power2.64 W
Noise37.3 dB(A)

LWFD7515LM-03 DC Centrifugal Blower 75 mm

75 mm | DC | Max airflow 9 m³/h | Max static pressure 109 Pa | 37.3 dB(A)

SKU: LWFD7515LM-03 Categories: Cooling Fans & Blowers, DC Centrifugal Blowers, Frame Ø75–120 mm

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

PDFRequest datasheetsent by an engineer within 1 business day

All files for LWFD7515LM-032 files · direct download

WEBPDimensional drawing WEBPPerformance curve

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

Aspirating smoke detection Medical electronics Fuel cells Dishwashers All industries →

Proven in projects

350 kW charger cabinet cooling BESS container thermal Wind, solar & inverter cooling All case studies →

Get a quote · LWFD7515LM-03

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WhatsApp / Phone+86 183 5827 4663 E-mail an engineersales@longwellfans.com Files for LWFD7515LM-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) LWFD7515LM-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 (1 here, rated 12 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.

Drawing & Curve LWFD7515LM-03

LWFD7515LM-03 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWFD7515LM-03 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

Files for LWFD7515LM-03: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.

Technical description LWFD7515LM-03

LWFD7515LM-03 is a LONGWELL DC Centrifugal Blower from the DC Centrifugal Blowers range, frame size 75 mm, rated 12 V DC, maximum airflow 9 m³/h, maximum static pressure 109 Pa, noise 37.3 dB(A), input power 2.64 W. The low-voltage brushless DC motor suits battery-powered equipment and electronics cooling with speed control on demand.

Technical data

Model	LWFD7515LM-03
Series	LWFD7515
Motor type	DC
Rated voltage	12 V
Current	0.22 A
Input power	2.64 W
Speed	3,000 rpm
Max. airflow	9 m³/h
Max. static pressure	109 Pa
Noise	37.3 dB(A)
Frame size	75 mm
Dimensions	75x15mm
Impeller material	Plastic(UL94-VO)

Typical applications

Power supplies and inverters
Telecom and server cabinets
Battery packs and EV chargers
Medical and laboratory equipment

Series LWFD7515: 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 LWFD7515LM-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 frame size (75 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
LWFD7515LM-03 this model	9 m³/h	109 Pa	3,000 rpm	2.64 W	37.3 dB(A)	12 V
LWFD7530HD-05	15 m³/h	95 Pa	2,500 rpm	4.8 W	37.8 dB(A)	48 V	View
LWFD7530MD-05	15 m³/h	95 Pa	2,500 rpm	4.8 W	37.8 dB(A)	24 V	View
LWFD7530LD-05	15 m³/h	95 Pa	2,500 rpm	3.6 W	37.8 dB(A)	12 V	View
LWFD7530HL-04	18 m³/h	136 Pa	3,000 rpm	7.2 W	41.8 dB(A)	48 V	View
LWFD7530ML-04	18 m³/h	136 Pa	3,000 rpm	6 W	41.8 dB(A)	24 V	View
LWFD7530LL-04	18 m³/h	136 Pa	3,000 rpm	4.8 W	41.8 dB(A)	12 V	View
LWFD7530HM-03	21 m³/h	185 Pa	3,500 rpm	9.6 W	45.1 dB(A)	48 V	View
LWFD7530MM-03	21 m³/h	185 Pa	3,500 rpm	7.2 W	45.1 dB(A)	24 V	View
LWFD7530LM-03	21 m³/h	185 Pa	3,500 rpm	6 W	45.1 dB(A)	12 V	View
LWFD7530HH-02	24 m³/h	242 Pa	4,000 rpm	12 W	48 dB(A)	48 V	View
LWFD7530MH-02	24 m³/h	242 Pa	4,000 rpm	8.4 W	48 dB(A)	24 V	View
LWFD7530LH-02	24 m³/h	242 Pa	4,000 rpm	7.2 W	48 dB(A)	12 V	View
LWFD7530HX-01	27 m³/h	306 Pa	4,500 rpm	14.4 W	50.6 dB(A)	48 V	View
LWFD7530MX-01	27 m³/h	306 Pa	4,500 rpm	9.6 W	50.6 dB(A)	24 V	View