What causes the fan to be too loud?

Noise can be caused by loose screws (vibration), dust buildup (increased resistance), or bearing type. Sleeve bearings are quiet but wear out; double-ball lasts longer but is slightly louder.

How do I know if the fan is failing?

Listen for clicking or grinding sounds, check RPM using software like HWMonitor (significantly lower than spec indicates issues), or check if blades spin freely without wobble when powered off.

Can I connect the fan to a power supply instead of the motherboard?

Yes, connecting to a PSU Molex runs the fan at 12V full speed, which is simple but noisier. Motherboard headers enable speed control, which is best for 4-pin PWM fans.

35X35X7mm High Efficiency 5V DC Ultra-Thin DC Blower Fan for Industrial IoT Sensor

Name: 35X35X7mm High Efficiency 5V DC Ultra-Thin DC Blower Fan for Industrial IoT Sensor
Brand: Fengxia Motor (Shanghai) Co., Ltd.
SKU: 2155601712

Shanghai, ChinaFengxia Motor (Shanghai) Co., Ltd.

US$1.60

500-4,999 Pieces

US$1.30

5,000+ Pieces

Sample price:US$4.00/piece.Request sample

Product profile

Customization

Available

Material

Plastic-Iron-Copper-Magnet

Blade Material

PBT 94ulv

Model NO.

3507

Type

DC Blower Fan

Electric Current Type

Mounting

Free Standing

Certification

RoHS, ISO, CE

Insulation Resistance

10mωor Over with at DC250V Megger

Ielectric Withstand Voltage

AC500V1s

Ambient Temperature

-10℃~+70℃(Operating) -40℃~+70℃(Storage)

Expected Life

+40° ,30000 Hours

Transport Package

Paper Box

Specification

Customized

Trademark

FUNSHARE

Origin

China

Production Capacity

100000 Pieces/Year

Key features

High Efficiency Cooling: Ultra-thin 35x35x7mm design ensures efficient heat dissipation for stable device operation.

Ultra-Quiet Operation: Designed for low noise performance, suitable for sensitive environments like IoT sensors.

Wide Voltage Tolerance: Operates effectively within a 5V to 13V range, providing flexible power compatibility.

Long Service Life: Double-ball bearings offer 5-10 years lifespan, suitable for 24/7 continuous operation.

Multi-Bearing Options: Available in sleeve, hydraulic, and double-ball types to balance noise and durability needs.

Certified Quality: Meets RoHS, ISO, CE, and FCC standards, ensuring safety and environmental compliance.

Full Customization: Supports OEM/ODM services with full customization from samples or designs available.

Versatile Application: Ideal for industrial IoT, UAVs, medical devices, and various consumer electronics.

Company profile

Importers and ExportersHigh Repeat Buyers Choice

Fengxia Motor (Shanghai) Co., Ltd.

Shanghai, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 5 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤3.20h

AI-Powered supplier vetting

SummaryThe supplier demonstrates strong customization, R&D, OEM/ODM, quality-control, and complaint-handling capabilities. It reports new products within the past year, provides customization from samples and designs through full customization, and serves known brands through OEM. Production includes two lines, inventory capability, defined inspection procedures, and four QA/QC inspectors. However, important operational limitations exist: no available SDK, no overseas agents, branches, warehouse, or showroom, no offline trade-show participation, and only one experienced export-trade employee. Manufacturing controls also show gaps, including no ongoing quantity reconciliation for each batch and no standard operating procedure for outsourced manufacturing. Financial evidence is represented only by years rather than substantive indicators, so credibility cannot be determined. The supplier holds an ISO9001:2015 certificate, but the available information does not establish broader certification coverage.

Supplier typeThe supplier operates as a manufacturer with two production lines, provides OEM and ODM services, offers inventory capability, and accepts FOB and EXW quotations. It also provides full customization, but lacks overseas agents, branches, warehouses, and showrooms.

CertificationsThe supplier reports an ISO9001:2015 certificate. No additional specific certifications are identified in the provided information.

After-Sales capabilityThe supplier has documented and followed procedures for customer complaints and corrective/preventive actions, supporting an established service-response process. However, it has no overseas agents, branches, warehouse, or showroom, which limits demonstrated overseas service infrastructure.

R&D capabilityThe supplier reports new products in the past year, provides ODM services, and assigns R&D personnel to product development, design drawings, production support, and specifications. Nevertheless, it has no available SDK and no design input, output, review, validation, or confirmation documents available for audit.

Production capacityProduction evidence includes two production lines, inventory capability, one-month average lead times in both peak and off-season periods, four QA/QC inspectors, written finished-product inspection instructions, and multiple listed production machines. Controls are weakened by the absence of ongoing batch quantity reconciliation and a standard operating procedure for outsourced manufacturing.

Customization capabilityThe supplier explicitly supports customization from samples, customization from designs, and full customization, with the same capability reported under both R&D and design services. This directly demonstrates broad customization coverage.

Product Q&A

Q:What is the expected lifespan of the fan?

Lifespan depends on the bearing type: sleeve bearings last ~2-3 years, hydraulic bearings ~4-5 years, and double-ball bearings can last 5-10 years with 24/7 tolerance.

Q:Why does the fan spin at 5V if the label says 12V?

The motor has a wide voltage tolerance, operating effectively between 5V and 13V. It may not start below approximately 7V.

Q:How can I reduce fan noise?

Use rubber grommets instead of screws, install a low-noise adapter or inline resistor to lower voltage, or adjust the BIOS fan curve to keep RPM low until temperatures rise.

Q:What is the difference between 3-pin and 4-pin connectors?

3-pin uses DC voltage control for fixed or stepped speeds. 4-pin uses PWM for automatic, precise, and quieter speed control. A 4-pin fan on a 3-pin header runs at full speed.

Q:How do I determine the correct airflow direction?

Look for arrows on the frame. Generally, front/side fans intake cool air, while rear/top fans exhaust hot air. Tower coolers push air toward the rear exhaust.