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 12V full speed, which is simpler but louder. Ensure total current per header stays under 1A.

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

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

Do more blades mean better performance?

More blades increase static pressure (good for radiators) but may be louder. Fewer blades increase airflow (good for ventilation) with lower noise. A balance of 7-9 blades is typical.

How do I know if the fan is dying?

Listen for clicking or grinding sounds. Check RPM via software; significantly low RPM is a red flag. Power off and flick the blade; wobble or stiffness indicates worn bearings.

505015mm New Model Brushless Cooling Centrifugal DC Blower

Name: 50*50*15mm New Model Brushless Cooling Centrifugal DC Blower
Brand: Fengxia Motor (Shanghai) Co., Ltd.
SKU: 2241830945

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

50*50*15mm New Model 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.

5015 (Large-Bore) DC Blower

Mounting

Free Standing

Certification

RoHS, ISO, CE

Transport Package

Paper Box

Specification

50*50*15mm

Origin

China

Production Capacity

100000 Pieces/Year

Key features

Customization Options: Supports full customization from samples, designs, or complete custom solutions.

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

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

International Certifications: Certified with RoHS, ISO, CE, and FCC standards for global market compliance.

High-Quality Material: Constructed with durable aluminum fans for efficient heat dissipation and longevity.

Professional R&D Team: Backed by 4 R&D engineers and 5 years of export experience ensuring innovation.

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

Versatile Application: Suitable for automotive, medical, communication, and industrial control equipment.

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: ≤3.12h

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 causes fan noise and how to fix it?

Noise can result from loose screws, dust buildup, or bearing type. Fix by tightening mounts, cleaning dust, lowering RPM, or choosing hydraulic bearings for a balance of quietness and durability.

Q:How do I determine the correct airflow direction?

Look for arrows on the frame. Generally, front/side fans intake cool air, while rear/top fans exhaust hot air. Tower coolers should push air toward the rear exhaust.

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 control. A 4-pin plug fits a 3-pin header but runs at full speed.

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

Sleeve bearings last ~2-3 years. Hydraulic bearings last ~4-5 years. Double-ball bearings last 5-10 years and tolerate 24/7 operation best.

Q:How can I make the fan quieter?

Use rubber pegs instead of metal screws to reduce vibration. Use a low-noise adapter to drop voltage, or adjust BIOS curves to keep RPM low until temperatures rise.