Should I connect to the motherboard or power supply?

Motherboard headers enable speed control (best for 4-pin PWM); PSU Molex runs at full 12V speed but is noisier.

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

The motor has a wide tolerance (5V-13V) but might not start below ~7V.

Does having more blades mean better performance?

More blades increase static pressure but may be louder; fewer blades increase airflow with lower noise. 7-9 blades is typical.

How do I know the fan is dying?

Listen for clicking/grinding, check RPM drops via software, or test if blades spin freely without wobble or stiffness.

45X45X5mm High Efficiency Low Vibration Small DC Blower Fan for Air Purifier Internal Cooling

Name: 45X45X5mm High Efficiency Low Vibration Small DC Blower Fan for Air Purifier Internal Cooling
Brand: Fengxia Motor (Shanghai) Co., Ltd.
SKU: 2152676362

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

US$1.90

500-4,999 Pieces

US$1.00

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.

4505

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 Efficiency & Low Vibration: 45x45x5mm DC blower fan designed for efficient heat dissipation with ultra-quiet operation.

Wide Application Scenarios: Suitable for air purifiers, notebooks, projectors, UAVs, and VR headsets.

Premium Material Construction: Blade made of PBT 94ulv; housing combines plastic, iron, copper, and magnet.

Global Safety Certifications: Compliant with RoHS, ISO, CE, and FCC standards for quality assurance.

Flexible Customization Options: Supports full customization from samples, designs, or specific customer needs.

Strict Quality Control: 100% visual and functional inspection for all finished products before delivery.

Reliable Manufacturer Support: ISO9001 certified factory with 4 R&D engineers and 5 years export experience.

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: ≤2.94h

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.