Are pin plug-in resistors obsolete

Update:19-07-2022
In the varistor market, although the growth rate of through-hole lead products is much slower than that of SMT products, manufacturers expect that the growth rate of through-hole lead varistors will still be between 5% and 10% this year. In the U.S. market, demand for through-lead varistors still accounts for approximately 55% to 60% of the total demand, although demand continues to shift to SMT packaged products, says Francis Kuzler, Senior Program Manager, Worldwide Information Technology (WIT) said. Traditional radial lead varistors with operating voltages between 150V and 300V are mainly used in industrial surge protection, markets including telecommunications, datacom, motor control, transient voltage surge suppression and power supplies.

Through-hole pin varistors are the mainstream in foreign markets, says Richard Kolster, sales manager at Maida Development. Because industrial applications require higher operating voltages and more reliable protection functions, pinned devices are still required in these applications, while SMT devices can only provide operating voltage ranges of 5V, 25V, and 50V. Although the fastest growing segment of varistors in foreign markets is SMT products, Maida does not intend to completely abandon through-lead technology, in fact they hope to continue growth in this area, Kolster said: "Surface mount The technology will definitely expand to high-voltage industrial applications, but we don't yet know when it will start.

Manganin Shunt04 

Overall, the product trend is towards EBW shunt resistor small size and light weight, but in industrial applications, this trend is not as good as in electronic products. applications. Most users tend to reduce component count to reduce cost and inventory said John Foster, Marketing Manager, Voltage Products, Littelfuse. Many manufacturers are seeing strong growth in this segment. Littelfuse expects double-digit growth in global sales of through-hole devices this year. "In some large computer power protection, peripheral circuits and uninterruptible power supply markets, the growth of through-hole devices is very strong." Foster pointed out. Strong demand for through-hole devices led to longer lead times, but prices remained stable.

Due to strong demand, lead times are lengthening. Some of the company's perforated products have lead times of 12 to 14 weeks, while others take 6 to 8 weeks. The company has ramped up production this year and plans to expand further next year. Maida's product lead times can be kept at eight to 12 weeks because they make their products locally in the United States, Kolster said. In this industry, lead times are even 20-24 weeks in some cases. Therefore, the supply time of domestic varistor manufacturers has become the key to competition. The varistor manufacturers have not ignored the demand for higher surge current capability in industrial applications. From an underlying trend, those devices with higher processing power help users move to smaller packages.
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