How do I know if the fan is dying?

Listen for clicking or grinding noises. Check RPM with software like HWMonitor; significantly lower RPM than spec indicates issues. Check for wobble or stiffness when spinning manually.

Can I connect the fan to the power supply?

Yes, you can connect to a PSU Molex for full 12V speed, though it is noisier. Motherboard headers are best for speed control, especially with 4-pin PWM fans.

What causes the fan to be too loud?

Loose screws causing vibration, dust buildup increasing air resistance, or the bearing type (sleeve bearings wear out and get louder over time).

30X30X7mm High Rpm DC Blower Fan for Kitchen Appliance Ventilation

Name: 30X30X7mm High Rpm DC Blower Fan for Kitchen Appliance Ventilation
Brand: Fengxia Motor (Shanghai) Co., Ltd.
SKU: 2151616282

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

High Durability & Long Life: Double-ball bearings last 5-10 years; sleeve bearings 2-3 years.

Ultra-Quiet Operation: Hydraulic bearings offer a quiet middle-ground; low-noise adapters available.

Full Customization Support: Customization from samples, designs, or full customization available.

Wide Voltage Tolerance: Motors run effectively from 5V to 13V, ensuring broad compatibility.

Certified Quality Standards: ISO9001, FCC, CE, and ROHS certified for safety and reliability.

Versatile Pin Options: 3-pin for DC control; 4-pin for precise PWM auto speed control.

Efficient Heat Dissipation: Ensures stable operation and extended service life for devices.

Compact & Portable Design: Suitable for notebooks, UAVs, VR headsets, and miniature 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: ≤3.50h

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:How can I reduce fan noise?

Use rubber grommets instead of screws, install a low-noise adapter 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 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 does the fan last?

Sleeve bearings last ~2-3 years. Hydraulic bearings last ~4-5 years. Double-ball bearings last 5-10 years and tolerate 24/7 use.

Q:Which direction should the fan face?

Follow the arrows on the frame. Generally, front/side fans intake cool air, while rear/top fans exhaust hot air.

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

The motor has a wide tolerance and runs from 5V to 13V. It might not start below ~7V but will spin at 5V.