How do I know if the fan is dying?

Listen for clicking/grinding, check RPM via software for drops below spec, or manually spin blades for wobble/stiffness.

Can I connect the fan to a power supply?

Yes, but it will run at full 12V speed. Motherboard headers enable speed control, especially with 4-pin PWM.

Does more blades mean better performance?

More blades increase static pressure (good for radiators) but are louder; fewer blades increase airflow (good for ventilation).

404020mm Low Noise Brushless Cooling Centrifugal DC Blower

Name: 40*40*20mm Low Noise Brushless Cooling Centrifugal DC Blower
Brand: Fengxia Motor (Shanghai) Co., Ltd.
SKU: 2234380515

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

40*40*20mm Low Noise Brushless Cooling Centrifugal DC Blower

US$2.50-3.00

1 Piece

Sample price:US$2.50/piece.Request sample

Product profile

Customization

Available

Material

Aluminum Fan

Electric Current Type

Model NO.

4505 DC Blower

Mounting

Free Standing

Certification

RoHS, ISO, CE

Transport Package

Paper Box

Specification

40*40*20mm

Origin

China

Production Capacity

100000 Pieces/Year

Key features

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

Wide Voltage Tolerance: Operates effectively within a 5V-13V range for versatile power compatibility.

Multiple Bearing Types: Available in sleeve, hydraulic, and double-ball bearings for different lifespans.

Multi-Industry Application: Suitable for automotive, medical, communication, and refrigeration systems.

International Certifications: Certified with RoHS, ISO, CE, and FCC standards for quality assurance.

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

Competitive Pricing: Offers high-quality cooling products with competitive prices and fast delivery.

Professional Technical Support: Provides professional guidance and comprehensive after-sales service.

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: ≤3.02h

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.