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

Connect to the motherboard header for speed control, especially with 4-pin PWM fans. Connecting to a PSU Molex runs the fan at 12V full speed, which is simple but noisier.

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

The fan has a wide voltage tolerance, operating between 5V and 13V. It might not start below approximately 7V, but it will spin at 5V once started.

Do more blades mean better performance?

More blades increase static pressure but may be slightly louder. Fewer blades provide higher airflow with lower noise. A typical balance is 7-9 blades for optimal performance.

How do I know if the fan is dying?

Listen for clicking or grinding sounds indicating bearing failure. Check RPM using software like HWMonitor; significantly lower RPM than spec signals issues. Also, check if blades spin freely without wobble.

30X30X7mm Stable Operation Small DC Blower Fan for Power Supply Cooling

Name: 30X30X7mm Stable Operation Small DC Blower Fan for Power Supply Cooling
Brand: Fengxia Motor (Shanghai) Co., Ltd.
SKU: 2154977492

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

US$2.20

500-4,999 Pieces

US$1.50

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.

3007

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

Wide Voltage Tolerance: Operates stably within a wide voltage range of 5V to 13V, ensuring compatibility with various power sources.

Multiple Bearing Options: Available in sleeve, hydraulic, and double-ball bearings to balance noise levels, lifespan, and performance needs.

High Durability & Long Life: Double-ball bearings offer 5-10 years of service life, suitable for 24/7 continuous operation in demanding environments.

Versatile Application Scenarios: Ideal for notebooks, projectors, UAVs, VR headsets, and industrial equipment due to compact design and efficient cooling.

Certified Quality Assurance: ISO9001 certified with RoHS, CE, and FCC standards, ensuring safety and reliability for global markets.

Full Customization Support: Offers OEM/ODM services, full customization from samples or designs, and tailored solutions for specific client needs.

Ultra-Quiet Operation: Features low-noise designs with options for rubber grommets and BIOS speed control to minimize vibration and sound.

Fast Delivery & Inspection: 100% finished product inspection and standard one-month lead time, ensuring quality and timely supply for orders.

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: ≤4.25h

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 can result from loose screws, dust buildup, or bearing type. Fix by tightening mounts, cleaning dust, lowering RPM via BIOS, or choosing hydraulic bearings for a balance of quietness and durability.

Q:How do I determine the correct airflow direction?

Look for arrows on the frame: arrows pointing out indicate exhaust, while arrows pointing in indicate intake. Generally, front/side fans intake cool air, and 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 or stepped speeds. 4-pin uses PWM for auto speed control, offering quieter and more precise operation. A 4-pin fan on a 3-pin header runs at full speed.

Q:How long does the fan last based on bearing type?

Sleeve bearings last ~2-3 years. Hydraulic bearings last ~4-5 years and are quieter. Double-ball bearings last 5-10 years and are tolerant of 24/7 operation.

Q:How can I make the fan quieter?

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