Third party inspection of electronic components: how to judge the product quality?

Date：2021-10-18 14:46:20Views：1114

Electronic component testing is the application of testing service industry technology in electronic information industry. With the great improvement of intelligence, the reliability requirements of electronic products have become an important index to measure the quality of electronic products. This is also an important link in the specific industrial chain of electronic components. The technical level of testing service is closely related to the quality of electronic components. Let's take a look at how to judge the quality of electronic components?

It is reported that the price of most refurbished materials is only one third of the original price. In fact, the real sense of renovation refers to the chip is removed from the old machine for renovation. Most of them can work normally after renovation, at least they are original materials in essence. For example, if some domestic MCUs that claim to be fully compatible with ST software and hardware are sold and used under the original brand, there is no problem. However, some speculators in the industry use domestic MCU, which is printed with ST silk screen and packaged into st MCU for sale. Although burning and downloading can be used normally, the difference may not be tested with test fixtures on the accuracy of peripherals, such as electrostatic protection level. It may not be found until the customer is really on the machine. At this time, the loss is quite large.

Generally speaking, if the chip on the board is found to have a problem before the product leaves the factory, the factory can also check which chip has a problem, heat the tin one by one, remove the problem chip, and arrange to re purchase the chip at the same time. If the fake chip has been machined into a product and the problem is found after leaving the factory, it will not only need additional rework, but also the manufacturer may face huge economic compensation.

In the special period of component shortage, all we can do is polish our eyes, strictly screen the supplier qualification, and test and check each batch of goods to avoid being cheated.

Inspection basis and standard of electronic components:

1. Fuse and fuse holder: GB 9364, IEC / en 60127, ul248, ul4248;

2. Fuse and low voltage fuse of photovoltaic system: GB / T 13539, IEC / en 60269, ul248, ul4248;

3. Fuse resistance and temperature fuse: sj2865, GB 9816, IEC / en 60691, ul1412, ul60691;

4. Thermistor: GB / T 6663.1, GB / T 7153, IEC / en 60539, IEC / en 60738, ul1434;

5. Varistors, surge protection devices MOV, tmov, PMoV, lightning protection trailing board and row plug, lightning protection module: GB / T 10193, GB / T 10194, GB 18802, IEC / en 61051, IEC / en 61643, ul1449, ul1363, ul498;

6. Capacitance: GB / T 6346, GB / T 2693, IEC 60384, IEC 60252, ul60384, ul810;

7. Connectors: cqc1101, GB 13140, IEC / en 61984, ul1977, ul2238;

8. Terminal block: GB 13140, IEC / en 60998, ul1059;

9. Plug: GB 2099, IEC / en 60884, UL817;

10. Socket: GB 2099, IEC / en 60320, ul498;

11. Quick connect terminals: GB 17196, IEC / en 61210, ul310, ul486;

12. Appliance coupler: GB 17465, IEC / en 60320, ul60320;

13. Wire assembly: GB 15934, IEC / en 60799, UL817, ul498;

14. Mobile towline row and plug: GB 2099, IEC / en 60884, ul1363;

15. Motor thermal protector: GB 14536.3, IEC / en 60730-2-2, ul60730-2-2;

16. Timer: GB 14536.8, IEC / en 60730-2-7, ul60730-2-7;

17. Temperature controller: GB 14536.1, IEC / en 60730-2-9, UL873, ul60730-2-9;

18. Motor starting protector: GB 14536.11, IEC / en 60730-2-22, ul60730;

19. Transformer: GB 19212, IEC / en 61558, ul61558;

20. Motor: GB 14711, IEC 60034, ul1004;

21. Relay: GB / T 21711, IEC / en 61810, ul61810 / ul508;

22. Universal switch: GB 15092, IEC / en 61058, UL20 / ul61058;

23. Industrial control equipment: GB 14048, IEC / en 60947, ul508;

24. Internal wires of electronic wires: GB / t3048, IEC / en 60227, UL758;

25. Power cord external power cord: GB / T 5023, GB / T 5013, IEC / en 50525, UL62, ul1581, ul2556;

26. PV cable and optical cable: GB / T 2951, IEC 60811, ul1685, ul4703;

27. Charging and tram cables and ev wires: GB / T 5013, iec60245 and UL758.

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