Should I connect to motherboard or power supply?

Motherboard header enables speed control (best for 4-pin PWM); PSU Molex runs at full speed but is noisier.

Why does the fan spin at 5V if labeled 12V?

Motors have wide tolerance (5V-13V) but might not start below ~7V.

Do more blades mean better performance?

More blades increase static pressure but may be louder; fewer blades increase airflow with lower noise. 7-9 blades is typical.

How do I know the fan is dying?

Listen for clicking/grinding, check RPM drops via software, or test if blades spin freely without wobble.

120X120X25mm Large Size High Efficiency DC Axial Flow Fan for Industrial Ventilation

Name: 120X120X25mm Large Size High Efficiency DC Axial Flow Fan for Industrial Ventilation
Brand: Fengxia Motor (Shanghai) Co., Ltd.
SKU: 2155324842

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

US$3.60

500-4,999 Pieces

US$2.10

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.

FD12025

Type

DC Axial Flow 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: Efficient heat dissipation ensures stable operation and extended service life for devices.

Ultra-Quiet Operation: Features compact design and ultra-quiet operation suitable for various scenarios.

Wide Application Scope: Suitable for notebooks, projectors, UAVs, medical, automotive, and communication equipment.

Full Customization: Offers full customization from samples and designs with expert guidance.

Certified Quality: ISO9001 certified with FCC, CE, and ROHS standards for enhanced quality.

Durable Bearings: Double-ball bearings last 5-10 years, tolerant to 24/7 operation.

Fast Delivery: Competitive prices and fast delivery to meet customer needs.

100% Inspection: 100% visual and function inspection for finished products.

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: ≤4.38h

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 causes fan noise and how to fix it?

Check mounting screws for vibration, remove dust buildup, lower RPM via BIOS, or consider bearing type (sleeve is quiet but wears out; hydraulic is a middle ground).

Q:Which direction should the fan face?

Follow arrows on the frame: intake for front/side (cool air in), exhaust for rear/top (hot air out).

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

3-pin uses DC voltage control; 4-pin uses PWM for auto speed control, quieter and precise operation.

Q:How long will the fan last?

Sleeve bearing lasts 2-3 years; hydraulic lasts 4-5 years; double-ball lasts 5-10 years.

Q:How can I make the fan quieter?

Use rubber pegs, inline resistors to lower voltage, or adjust BIOS fan curve to keep RPM low until temperature increases.