Should I connect to the motherboard or power supply?

Connect to the motherboard header for speed control (best with 4-pin PWM) or PSU Molex for full speed at 12V.

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

Most motors have a wide tolerance running from 5V to 13V, though they may not start below approximately 7V.

Do 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 if the fan is dying?

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

18184mm Square Motor Brushless Cooling Centrifugal DC Blower

Name: 18*18*4mm Square Motor Brushless Cooling Centrifugal DC Blower
Brand: Fengxia Motor (Shanghai) Co., Ltd.
SKU: 2236400795

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

18*18*4mm Square Motor 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

Blade Material

PBT 94ulv

Model NO.

1804 DC Blower

Type

DC Blower Fan

Electric Current Type

Mounting

Free Standing

Certification

RoHS, ISO, CE

Transport Package

Paper Box

Specification

18*18*4mm

Origin

China

Production Capacity

100000 Pieces/Year

Key features

Wide Voltage Compatibility: Operates reliably within a 5V to 13V voltage range for flexible power integration.

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

Full Customization Service: Supports customization from samples, designs, and offers full customization options.

Multi-Industry Application: Widely used in drones, automotive, medical, and industrial control equipment.

International Certifications: Products certified with RoHS, ISO, CE, and FCC for global market compliance.

High-Quality Materials: Constructed with Aluminum Fan and PBT 94ulv Blade Material for durability.

Professional Technical Support: Provides professional technical guidance and complete customization services.

Strict Quality Control: 100% visual and function inspection with ISO9001:2015 management system.

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: ≤3.28h

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.