Frame size40 mm1.6 in
Max airflow15 m³/h9 CFM
Max static pressure87 Pa0.35 in. wg
Voltage12 V
Speed8,500 rpm
Input power2.4 W
Noise51.5 dB(A)

LWAD4020LM-03 DC Axial Cooling Fan 40 mm

40 mm | DC | Max airflow 15 m³/h | Max static pressure 87 Pa | 51.5 dB(A)

SKU: LWAD4020LM-03 Categories: Cooling Fans & Blowers, DC Axial Cooling Fans, Frame 25–40 mm

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Samples in 1–3 days
Production 15–30 days
18-month warranty
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WhatsApp / Phone+86 183 5827 4663 E-mail an engineersales@longwellfans.com All files for LWAD4020LM-03drawings · curves · datasheet

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T/T 30 / 70 · FOB / CIF / DDP
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Drawings & downloads
Technical description

LWAD4020LM-03 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWAD4020LM-03 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

Need a non-standard size or another format? Ask an engineer or search the download center.

LWAD4020LM-03 is a LONGWELL DC Axial Cooling Fan from the DC Axial Cooling Fans range, frame size 40 mm, rated 12 V DC, maximum airflow 15 m³/h, maximum static pressure 87 Pa, noise 51.5 dB(A), input power 2.4 W. The low-voltage brushless DC motor suits battery-powered equipment and electronics cooling with speed control on demand.

Technical data

Model	LWAD4020LM-03
Series	LWAD4020
Motor type	DC
Rated voltage	12 V
Current	0.2 A
Input power	2.4 W
Speed	8,500 rpm
Max. airflow	15 m³/h
Max. static pressure	87 Pa
Noise	51.5 dB(A)
Frame size	40 mm
Dimensions	40x20mm
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 LWAD4020: 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 frame size (40 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
LWAD4020LM-03 this model	15 m³/h	87 Pa	8,500 rpm	2.4 W	51.5 dB(A)	12 V
LWFD4010MD-05	2.4 m³/h	23 Pa	5,000 rpm	0.96 W	22.4 dB(A)	24 V	View
LWFD4010LD-05	2.4 m³/h	23 Pa	5,000 rpm	0.96 W	22.4 dB(A)	12 V	View
LWFD4010KD-05	2.4 m³/h	23 Pa	5,000 rpm	1 W	21.1 dB(A)	5 V	View
LWFD4010ML-04	3 m³/h	33 Pa	6,000 rpm	1.2 W	26.4 dB(A)	24 V	View
LWFD4010LL-04	3 m³/h	33 Pa	6,000 rpm	1.2 W	26.4 dB(A)	12 V	View
LWFD4010KL-04	3 m³/h	33 Pa	6,000 rpm	1.25 W	25.1 dB(A)	5 V	View
LWFD4010MM-03	3.6 m³/h	44 Pa	7,000 rpm	1.44 W	29.7 dB(A)	24 V	View
LWFD4010LM-03	3.6 m³/h	44 Pa	7,000 rpm	1.44 W	29.7 dB(A)	12 V	View
LWFD4010KM-03	3.6 m³/h	44 Pa	7,000 rpm	1.5 W	28.4 dB(A)	5 V	View
LWFD4010MH-02	4.2 m³/h	58 Pa	8,000 rpm	1.92 W	32.6 dB(A)	24 V	View
LWFD4010LH-02	4.2 m³/h	58 Pa	8,000 rpm	1.68 W	32.6 dB(A)	12 V	View
LWFD4010KH-02	4.2 m³/h	58 Pa	8,000 rpm	1.75 W	31.3 dB(A)	5 V	View
LWFD4010MX-01	4.8 m³/h	73 Pa	9,000 rpm	2.4 W	35.2 dB(A)	24 V	View
LWFD4010LX-01	4.8 m³/h	73 Pa	9,000 rpm	1.92 W	35.2 dB(A)	12 V	View