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This part of JB/T 8949 specifies the model and size, rated values and characteristics, inspection rules, quality assessment categories, labeling, packaging, storage, and purchase order of ordinary bolt shaped rectifier tubes (hereinafter referred to as rectifier tubes) with a rated average forward current of 5A-500A for the shell. This section is applicable to rectifier tubes. The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 4023 Semiconductor Devices - Discrete Devices and Integrated Circuits - Part 2: Rectifier Diodes - GB/T 4937-1995 Mechanical and Climatic Test Methods for Semiconductor Devices - JB/T 2423 Method for Model Selection of Power Semiconductor Devices - JB/T 4277 Packaging of Power Semiconductor Devices - JB/T 7624-2013 Test Methods for Rectifier Diodes Function of testing report:1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report 2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problems100% inspection and testing process:1. Telephone communication and confirmation of requirements 2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:1. The testing industry is fully covered, meeting different testing needs 2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate 4. Free initial testing, with no testing fees charged 5. Self service order delivery for free on-site sampling 6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China
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