Quality Control

At Xiamen Tongkong Technology , quality control is at the core of everything we do. As a trusted supplier of critical electronic and electrical components, we understand the importance of consistent performance, traceability, and compliance. Our quality assurance system ensures that every component we ship meets customer expectations, application requirements, and relevant international standards.

Verified Sourcing from Trusted Manufacturers
We only source components from certified, audited manufacturers and authorized distribution channels. Each supplier is evaluated based on quality history, certifications, delivery performance, and regulatory compliance.

Key Supplier Requirements:

ISO 9001 or equivalent certification

RoHS, REACH, and CE compliance

Full traceability of component origin and lot number

Anti-counterfeit procedures for brand-name parts

 

Incoming Inspection for Critical Items
For critical components or customer-specified items, we perform incoming inspection before warehousing. This includes:

Visual inspection: Checking for damage, contamination, proper labeling, and packaging integrity

Label verification: Confirming part numbers, date codes, lot numbers, and supplier traceability

Documentation check: Verifying certificates of conformity, datasheets, and manufacturer origin

Optional additional testing is available upon request, such as:

Solderability testing

X-ray inspection for ICs

Dimension checks for electromechanical parts

 

Certification & Documentation Support
We provide documentation that supports compliance and traceability for regulated applications. These include:

Manufacturer Certificate of Conformance (CoC)

RoHS / REACH Declaration of Compliance

UL recognition data for certified components

Technical datasheets and part specifications

Upon request, we can consolidate multi-line BOM certification packages for OEM procurement.

 

Batch Tracking & Inventory Control
Each outgoing shipment is traceable by invoice number, lot code, and customer order reference. Our inventory management system ensures FIFO rotation and shelf-life control for date-sensitive parts like capacitors and relays.

All parts are stored in ESD-protected environments, with temperature and humidity control for sensitive products.