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 noisier.

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

The motor has a wide tolerance and can run from 5V to 13V, though it might not start below approximately 7V.

Does having 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 using software like HWMonitor; significantly lower RPM than spec indicates issues. Also, check if blades spin freely without wobble.

75X75X20mm High Temperature Resistant Small DC Blower Fan for Automotive Electronics Cooling

Name: 75X75X20mm High Temperature Resistant Small DC Blower Fan for Automotive Electronics Cooling
Brand: Fengxia Motor (Shanghai) Co., Ltd.
SKU: 2156593892

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

US$2.50

500-4,999 Pieces

US$1.90

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.

7520

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

Multi-Scenario Use: Suitable for automotive, UAVs, medical, and consumer electronics cooling.

Certified Quality: Meets RoHS, ISO, CE, and FCC standards for global compliance.

Customization Options: Offers full customization from samples, designs, or OEM/ODM services.

Quiet Operation: Features ultra-quiet performance with options for sleeve, hydraulic, or ball bearings.

Flexible Voltage: Wide tolerance allows operation from 5V to 13V for versatile integration.

100% Inspection: Every unit undergoes visual and functional inspection before shipment.

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: ≤4.77h

AI-Powered supplier vetting

SummaryThe supplier provides extensive customization options and has a strong research and development capability, including ODM services and new product development. However, they lack overseas warehouse and showroom capabilities, and do not have overseas agents or participate in trade shows. Their financial data is up-to-date and they hold an ISO9001:2015 certification. Despite having quality assurance processes, the manufacturing capacity seems limited with only two production lines and no ongoing volume reconciliation or outsourcing SOPs.

CertificationsHolds an ISO9001:2015 certificate, indicating compliance with quality management standards.

After-Sales capabilityHas clear procedures and records for handling customer complaints and implementing corrective actions.

Financial creditFinancial data is current, with information available up to the last three years, demonstrating financial stability.

R&D capabilityStrong R&D capabilities with evidence of new product development, though lacking in audit documentation.

Production capacityLimited production capability with only two production lines, and lacks ongoing volume reconciliation and outsourcing SOPs.

Customization capabilityOffers full customization services from samples and designs, with a comprehensive design service capability.

Client casesProvides OEM services for well-known brands, suggesting a history of working with reputable companies.

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 quieter operation.

Q:How do I determine the correct fan direction?

Look for arrows on the frame. Generally, front/side fans are for intake (cool air in), and rear/top fans are for exhaust (hot air out).

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 will the fan last?

Sleeve bearings last ~2-3 years, hydraulic bearings ~4-5 years, and double-ball bearings can last 5-10 years with 24/7 tolerance.

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.