Should I connect the fan to the motherboard or power supply?

Connect to the motherboard header for speed control (best with 4-pin PWM). Connecting to a PSU Molex runs it at full 12V speed, which is noisier.

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

The fan has a wide voltage tolerance (5V-13V). It may not start below ~7V but will spin at 5V.

Do more blades mean better performance?

More blades increase static pressure but may be louder. Fewer blades increase airflow and reduce noise. A balance of 7-9 blades is typical.

How do I know if the fan is failing?

Listen for clicking or grinding sounds. Check RPM using software; significantly lower RPM indicates issues. If blades wobble or are stiff, bearings are worn.

120X120X25mm High Airflow DC Bracket Cooling Fan for Projector Cooling

Name: 120X120X25mm High Airflow DC Bracket Cooling Fan for Projector Cooling
Brand: Fengxia Motor (Shanghai) Co., Ltd.
SKU: 2154023962

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

US$5.50

500-4,999 Pieces

US$4.20

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.

FX12025

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

High Airflow Design: 120x120x25mm frame ensures efficient heat dissipation for projectors and electronics.

Ultra-Quiet Operation: Optimized blade design and bearing options provide low noise for stable device operation.

Wide Voltage Tolerance: Operates effectively from 5V to 13V, compatible with various power sources.

Durable Bearings: Available in sleeve, hydraulic, and double-ball types for longevity up to 10 years.

Certified Quality: Meets RoHS, CE, FCC, and ISO9001 standards for safety and reliability.

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

Versatile Application: Suitable for projectors, UAVs, VR headsets, and various electronic devices.

Fast Delivery: Standard lead time of one month with efficient production lines.

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: ≤2.81h

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?

Noise may result from loose screws, dust buildup, or bearing type. Tighten mounts, clean dust, or consider hydraulic bearings for a quieter operation.

Q:How do I determine the correct airflow direction?

Look for arrows on the frame. Typically, front/side fans intake cool air, while rear/top fans exhaust hot air.

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

3-pin uses DC voltage control for fixed speeds. 4-pin uses PWM for automatic, precise, and quieter speed control. 4-pin fans run at full speed on 3-pin headers.

Q:How long does the fan last?

Sleeve bearings last 2-3 years. Hydraulic bearings last 4-5 years. Double-ball bearings can last 5-10 years under 24/7 use.

Q:How can I make the fan quieter?

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