How can I make the fan quieter?

Use rubber pegs to reduce vibration, use inline resistors to lower voltage, or adjust the BIOS fan curve to keep RPM low until temperatures rise.

Can I connect the fan to the 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 allow for speed control.

How do I know if the fan is dying?

Listen for clicking or grinding noises, check if RPM is much lower than specified using monitoring software, or check if blades spin freely without wobble.

90X90X25mm Waterproof Energy Saving DC Brushless Frameless Cooling Fan for Set-Top Box Cooling

Name: 90X90X25mm Waterproof Energy Saving DC Brushless Frameless Cooling Fan for Set-Top Box Cooling
Brand: Fengxia Motor (Shanghai) Co., Ltd.
SKU: 2153982902

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

US$4.50

500-4,999 Pieces

US$3.72

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.

FX9025

Type

DC Frameless Bracket 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

Waterproof & Energy Saving: 90x90x25mm DC brushless frameless fan designed for set-top box cooling with high efficiency.

Wide Voltage Tolerance: Operates reliably within a 5V-13V range, ensuring compatibility with various power sources.

Multiple Bearing Options: Available in sleeve, hydraulic, and double-ball bearings for different noise and lifespan needs.

Customization Services: Supports OEM/ODM, full customization from samples/designs, and tailored insulation specs.

Certified Quality: ISO9001, CE, RoHS, and FCC certified, ensuring safety and compliance for global markets.

Long Expected Life: Double-ball bearings offer 5-10 years lifespan; hydraulic bearings provide 4-5 years of service.

Versatile Application: Suitable for set-top boxes, UAVs, medical devices, and various electronic cooling scenarios.

Quiet Operation Design: Optimized blade count (7-9) and low-noise adapters available for silent performance.

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: ≤2.90h

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 should I do if the fan is too loud?

Check for loose screws causing vibration, remove dust buildup, lower RPM via BIOS, or consider switching to hydraulic bearings for a quieter operation.

Q:Why does the fan spin at 5V when labeled 12V?

The motor has a wide voltage tolerance (5V-13V). It may run at 5V but might not start below approximately 7V.

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

3-pin fans use DC voltage control for fixed or stepped speeds. 4-pin fans use PWM for auto speed control, offering quieter and more precise operation.

Q:How long will the fan last?

Lifespan depends on the bearing type: Sleeve bearings last ~2-3 years, hydraulic bearings ~4-5 years, and double-ball bearings 5-10 years.

Q:Which direction should the fan face?

Look for arrows on the frame. Generally, front/side fans are for intake (cool air in), and rear/top fans are for exhaust (hot air out).