A brief discussion of several domestic protection device suppliers and their advantages and characteristics

  A netizen expressed his views on some protection device suppliers, but his discussion was not very comprehensive, so you can also add to it.

　　(1) Resettable fuses: I mainly recognize Littlefuse (mostly SMD) and EPCOS from abroad, as well as Jinke Electronics from China. I have never come across any other brands. In the field of railway signals, most people use the above brands.

　　(2) TVS tube: mainly Semtech, on SEMIconductor, protekdevices (SLV2.8-4), ST, Vishay, high-power ones also use littlefuse, etc.

　　(3) Gas discharge tubes: EPCOS from abroad, Penang Electronics from China, and of course, we have also used domestic companies such as Langtuo and Shenbo, but mainly limited to R&D products.

　　(4) Varistor: Mainly from EPCOS, and domestic ones include Langtuo.

　　(5) Common mode inductors: Junbao and Chiba from Taiwan, EPCOS and Murata from Germany.

　　(6) Semiconductor discharge tube TSS: mainly ST's TPN3021 and SMP100LC systems.

　　What are the advantages of domestic protective devices compared with foreign ones? The price of domestic protective devices is low, basically about 1/6 of foreign brands; the delivery time of domestic protective devices is short, basically within 2 weeks, while foreign products sometimes take up to 3 to 6 months. Domestic protective device suppliers, including Taiwan, have good service attitudes and provide various application solutions.

　　The following are some opinions from other netizens. You can also list the suppliers of protection components you know in the comments below so that everyone can also know about them.

　　Railway products are not sensitive to the cost of protection components but require reliability, so foreign products almost monopolize the market.

　　Now when we apply for R&D samples using gas discharge tubes, if the supervisor sees that they are not from EPCOS or Penang, they will reject them! When using resettable fuses, everyone loves littlefuse and JK.

　　Varistors are almost all EPCOS, although we value the products of a famous Taiwanese company, Jun*. TVS tubes are foreign, and even Taiwanese ones have no chance.

　　Hardware module circuits and ports: CPU small system, MODEM, LAN, PRINT, COM, USB, 13.56MHz contactless card reader, Bluetooth, WIFI, GSM/GPRS, WCDMA, CDMA, DC-DC power supply system, LCD control system, magnetic head card reader module, IC card reader module, resistance or capacitance touch screen module, etc.

　　Fuses, common mode inductors, magnetic beads, shielding covers, TVS, varistors, and lightning protection are relatively rarely used, but the main brands are: Penang, ON Semiconductor, SEMTECH, and Würth. Others can be ignored!

　　Penang has begun to seize the EPCos market on a large scale in the field of ceramic gas discharge tubes, mainly Huawei and ZTE, so you can use it boldly!