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 size97 mm3.8 in
Max airflow43.8 m³/h26 CFM
Max static pressure212 Pa0.85 in. wg
Voltage48 V
Speed3,000 rpm
Input power14.4 W
Noise47.5 dB(A)

LWFD9733HH-02 DC Centrifugal Blower 97 mm

97 mm | DC | Max airflow 43.8 m³/h | Max static pressure 212 Pa | 47.5 dB(A)

SKU: LWFD9733HH-02 Categories: Cooling Fans & Blowers, DC Centrifugal Blowers, Frame Ø75–120 mm

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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 LWFD9733HH-022 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 →

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WhatsApp / Phone+86 183 5827 4663 E-mail an engineersales@longwellfans.com Files for LWFD9733HH-02datasheet · 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) LWFD9733HH-02

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 48 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 LWFD9733HH-02

LWFD9733HH-02 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWFD9733HH-02 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

Files for LWFD9733HH-02: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.

Technical description LWFD9733HH-02

LWFD9733HH-02 is a LONGWELL DC Centrifugal Blower from the DC Centrifugal Blowers range, frame size 97 mm, rated 48 V DC, maximum airflow 43.8 m³/h, maximum static pressure 212 Pa, noise 47.5 dB(A), input power 14.4 W. The low-voltage brushless DC motor suits battery-powered equipment and electronics cooling with speed control on demand.

Technical data

Model	LWFD9733HH-02
Series	LWFD9733
Motor type	DC
Rated voltage	48 V
Current	0.3 A
Input power	14.4 W
Speed	3,000 rpm
Max. airflow	43.8 m³/h
Max. static pressure	212 Pa
Noise	47.5 dB(A)
Frame size	97 mm
Dimensions	97x33mm
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 LWFD9733: 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 LWFD9733HH-02

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 (97 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
LWFD9733HH-02 this model	43.8 m³/h	212 Pa	3,000 rpm	14.4 W	47.5 dB(A)	48 V
LWFD9733HD-05	21.6 m³/h	53 Pa	1,500 rpm	4.8 W	32.4 dB(A)	48 V	View
LWFD9733MD-05	21.6 m³/h	53 Pa	1,500 rpm	4.8 W	32.4 dB(A)	24 V	View
LWFD9733LD-05	21.6 m³/h	53 Pa	1,500 rpm	3.6 W	32.4 dB(A)	12 V	View
LWFD9733HL-04	29.4 m³/h	94 Pa	2,000 rpm	7.2 W	38.7 dB(A)	48 V	View
LWFD9733ML-04	29.4 m³/h	94 Pa	2,000 rpm	7.2 W	38.7 dB(A)	24 V	View
LWFD9733LL-04	29.4 m³/h	94 Pa	2,000 rpm	4.8 W	38.7 dB(A)	12 V	View
LWFD9733HM-03	36.6 m³/h	147 Pa	2,500 rpm	9.6 W	43.5 dB(A)	48 V	View
LWFD9733MM-03	36.6 m³/h	147 Pa	2,500 rpm	9.6 W	43.5 dB(A)	24 V	View
LWFD9733LM-03	36.6 m³/h	147 Pa	2,500 rpm	7.2 W	43.5 dB(A)	12 V	View
LWFD9733MH-02	43.8 m³/h	212 Pa	3,000 rpm	12 W	47.5 dB(A)	24 V	View
LWFD9733LH-02	43.8 m³/h	212 Pa	3,000 rpm	9.6 W	47.5 dB(A)	12 V	View
LWFD9733HX-01	51 m³/h	288 Pa	3,500 rpm	19.2 W	50.8 dB(A)	48 V	View
LWFD9733MX-01	51 m³/h	288 Pa	3,500 rpm	14.4 W	50.8 dB(A)	24 V	View
LWFD9733LX-01	51 m³/h	288 Pa	3,500 rpm	12 W	50.8 dB(A)	12 V	View