What causes the fan to be too loud?

Noise can result from loose screws causing vibration, dust buildup increasing resistance, or the inherent noise level of the bearing type (e.g., double-ball is louder than sleeve).

Is OEM/ODM service available?

Yes, we offer full customization services including customization from samples, designs, and complete new specifications.

What are the minimum order quantity and lead time?

The Minimum Order Quantity is 30 sets. The average lead time is one month for both peak and off-peak seasons.

30304mm Speed Control Brushless Cooling Centrifugal DC Blower

Name: 30*30*4mm Speed Control Brushless Cooling Centrifugal DC Blower
Brand: Fengxia Motor (Shanghai) Co., Ltd.
SKU: 2243877805

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

30*30*4mm Speed Control Brushless Cooling Centrifugal DC Blower

US$1.80-2.80

1 Piece

Sample price:US$2.50/piece.Request sample

Product profile

Customization

Available

Material

Aluminum Fan

Blade Material

PBT 94ulv

Model NO.

3004 DC Blower

Type

DC Blower Fan

Electric Current Type

Mounting

Free Standing

Certification

RoHS, ISO, CE

Transport Package

Paper Box

Specification

30*30*4mm

Origin

China

Production Capacity

100000 Pieces/Year

Key features

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

Multiple Bearing Options: Choose Sleeve, Hydraulic, or Double-ball bearings for varied lifespan and noise needs.

OEM/ODM Customization: Full customization available from samples, designs, or complete new specifications.

Dual Control Interfaces: Supports 3-pin DC voltage control and 4-pin PWM for precise speed adjustment.

Multi-Industry Application: Suitable for automotive, medical, communication, and industrial control equipment.

International Certifications: Compliant with RoHS, CE, ISO, and FCC standards for global market access.

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

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

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: ≤3.33h

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 is the difference between 3-pin and 4-pin connectors?

3-pin uses DC voltage control for fixed or stepped speeds. 4-pin uses PWM for automatic, precise, and quieter speed variation controlled by the motherboard.

Q:How long does the fan last based on bearing type?

Sleeve bearing lasts ~2-3 years. Hydraulic bearing lasts ~4-5 years. Double-ball bearing lasts 5-10 years and tolerates 24/7 operation.

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

Most motors have a wide tolerance range of 5V-13V. However, they may not start spinning if the voltage drops below approximately 7V.

Q:How can I reduce fan noise?

Use rubber grommets instead of metal screws, install an inline resistor to lower voltage, or adjust the BIOS curve to keep RPM low until temperatures rise.

Q:Which direction should the fan face?

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