DC Single Inlet Centrifugal Fan, 140mm, 24V

5 out of 5 based on 2 reviews | Write a review

$454.49

Factory price DC turbo single inlet centrifugal fan operates on direct current (DC) electricity and features a single air inlet for drawing in air. ATO low noise centrifugal fan comes with a 140mm impeller and 85W motor, working at 24V DC voltage and 3.6A current, which is widely used in HVAC systems, electronics cooling, and industrial machinery.

SKU: ATO-SICF-DC140

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Overview
Proposition 65 Warning

DC single inlet centrifugal fan with 140mm impeller is a type of exhaust blower powered by a 24V direct current (DC) motor, designed to move air or gases. This low noise centrifugal fan features a single inlet where air is drawn into the fan and a centrifugal mechanism that forces the air to flow radially outwards, increasing its velocity and pressure.

Specification

Model	ATO-SD-F140B-EC-00
Operating Voltage	24V DC
Max. Power	85W
Motor Power	85W
Max. Current	3.6A
Noise	63dB(A)
Speed	1800rpm
Impeller Diameter	140mm
Air Volume	440m³/h (260 cfm)
Speed Regulation	0~10VDC / PWM
Impeller Material	Galvanized Sheet
Turbo Material	Cold Rolled Sheet Spray Painting
Rotation Direction	Clockwise CW (from the rotor end)
Operation Mode	S1
Bearing	Ball Bearing
Operating Temperature	-25~60℃
Motor Protection	Thermal Protection, Soft Start Protection, Stall Protection
Performance	Low Noise Fan
Protection Level	IP55
Insulation Level	B
Certificate	CCC, RoHS

Dimension (Unit: mm)

DC single inlet centrifugal fan dimension

Performance Curve

DC single inlet centrifugal fan performance curve

Wiring

DC single inlet centrifugal fan wiring

Tips: Difference between double inlet and single inlet centrifugal fan

The primary difference between double inlet and single inlet centrifugal fans lies in their air intake and airflow patterns.

Single Inlet Centrifugal Fan: This fan has only one inlet through which air enters. The air is drawn in and then accelerated by the impeller before being expelled out through the outlet. Single inlet fans are simpler in design and typically used in applications where space is limited and where only one direction of air intake is needed.

Double Inlet Centrifugal Fan: This fan features two inlets, allowing air to enter from both sides of the impeller. This design increases the fan’s capacity and efficiency by allowing more air to be drawn in and processed simultaneously. Double inlet fans are often used in larger systems or where higher airflow is required.

*WARNING: This product can expose you to chemicals, including lead, which is known to the State of California to cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.

Existing reviews of DC Single Inlet Centrifugal Fan, 140mm, 24V

Input signal

I'm considering buying this "140mm 24V single-inlet DC centrifugal fan," but I have some questions about its 0-10V PWM control signal. How should I handle the PWM input if I only want the fan to run at full speed?

From: Sams | Date: 07/04/2026

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ATO Responded

Specifically, if the PWM input is disconnected, is the fan speed 0% or 100%? With the PWM input disconnected, the fan stops (0%). To achieve full speed, a 100% PWM input must be provided to the control terminal.

Reliable, low-noise fan

We’ve been using the 140mm DC Single Inlet Centrifugal Fan for our HVAC system, and it’s been performing really well. The fan runs quietly, even with the 85W motor at 24V, providing efficient airflow without creating much noise. It’s been a great addition to our electronics cooling setup as well. The 3.6A current draws just the right amount of power, and the fan’s durable build makes it perfect for industrial machinery. Excellent value for the price, and I’d definitely recommend it for anyone needing a reliable, low-noise fan.

From: Silas | Date: 14/11/2025

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