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 PSU Molex runs it at full 12V speed, which is simpler but louder.

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

Most fans have a wide voltage tolerance, running from 5V to 13V. They may not start below approximately 7V.

Do more blades mean better performance?

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

How do I know if the fan is dying?

Listen for clicking or grinding noises. Check RPM via software; significantly lower than spec is a red flag. Power off and check if blades spin freely without wobble.

30307mm Square Motor Brushless DC Blower for Optimal Cooling Performance

Name: 30*30*7mm Square Motor Brushless DC Blower for Optimal Cooling Performance
Brand: Fengxia Motor (Shanghai) Co., Ltd.
SKU: 2130257912

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

30*30*7mm Square Motor Brushless DC Blower for Optimal Cooling Performance

US$1.50-2.20

1,000 Pieces

Sample price:US$2.20/piece.Request sample

Product profile

Customization

Available

Material

Aluminum Fan

Blade Material

PBT 94ulv

Model NO.

3007 DC Blower

Type

DC Blower Fan

Electric Current Type

Mounting

Free Standing

Certification

RoHS, ISO, CE

Transport Package

Paper Box

Specification

30*30*7mm

Origin

China

Production Capacity

100000 Pieces/Year

Key features

Customizable Design: Supports customization from samples, designs, and full customization services.

Wide Voltage Tolerance: Operates effectively within a 5V to 13V range for flexible power applications.

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

Global Certifications: Certified with RoHS, ISO, CE, and FCC standards for international compliance.

Versatile Connectivity: Supports 3-pin DC and 4-pin PWM connections for precise speed control.

High-Quality Materials: Constructed with Aluminum fans and PBT 94ulv blades for durability.

100% Quality Inspection: Every finished product undergoes visual and functional inspection before shipping.

Fast Delivery Service: Competitive pricing and fast delivery to satisfy customer needs globally.

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: ≤3.20h

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 balance of silence and durability.

Q:Which direction should the fan face?

Follow the arrows on the frame: intake arrows point to front/side for cool air, and exhaust arrows point to rear/top for hot air.

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

3-pin uses DC voltage control with fixed speeds. 4-pin uses PWM for motherboard auto-adjustment, offering quieter and more precise speed control.

Q:How long will the fan last?

Lifespan depends on the bearing: Sleeve (~2-3 years), Hydraulic (~4-5 years), and Double-ball (5-10 years, tolerant of 24/7 use).

Q:How can I make the fan quieter?

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