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  6. Transient phenomenon protection using BOURNS varistors for power supply.

Transient phenomenon protection using BOURNS varistors for power supply.

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last updated:Apr 30, 2026

セイワ 東京本社、関西支社、名古屋営業所、中国無錫  グループ会社 エレクトロン(長野県松本市)
セイワ 東京本社、関西支社、名古屋営業所、中国無錫  グループ会社 エレクトロン(長野県松本市)
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For protection of the power circuit. For those looking for domestic manufacturer alternatives.

In the power supply industry, ensuring stable operation of equipment and safety is the top priority. Transient voltage fluctuations caused by lightning strikes or abnormalities in power lines can potentially cause serious damage to power circuits and connected devices. The Bourns CVQ series varistors are essential for protecting circuits from these transient phenomena and enhancing the reliability of equipment. This product is compatible with a wide range of AC and DC voltages and can be applied to various power supply systems. It can also be considered as an alternative to domestic manufacturers' products. 【Usage Scenarios】 - Communication equipment - Industrial power supplies - AC power supply networks 【Benefits of Implementation】 - Reduced risk of equipment failure due to transient phenomena - Stable operation of systems - Extended lifespan of equipment

    ResistorsOther electronic parts
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Transient phenomenon protection using BOURNS varistors for power supply.

image varista.jpg
image varista.jpg
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【Features】 - Five sizes: 7 mm, 10 mm, 14 mm, 20 mm, 23 mm - Wide current and energy handling capabilities - AC voltage range: 60 to 550 Vrms - DC operating voltage range: 85 to 745 Vdc - Compatible with tape and reel packaging for automatic mounting (7 to 20 mm) - Compliant with RoHS directive 【Our Strengths】 We handle a diverse range of semiconductors and electronic components, supporting our customers' product development. Starting with the Bourns CVQ series, we provide products that best meet our customers' needs and offer technical support as well.

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Applications/Examples of results

AC line protection • Surge protection device • LED lighting • Inverter for solar power generation • Power supply unit • Industrial electronic equipment • Remote radio unit (RRU), 5G applications • Power over Ethernet (PoE) • High-value consumer goods

Company information

セイワ

セイワ 東京本社、関西支社、名古屋営業所、中国無錫  グループ会社 エレクトロン(長野県松本市)

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The development of electronics has given people great dreams and has turned those dreams into reality, one by one. This development has been passed on to the 21st century, inspiring even greater dreams and hopes. I am deeply grateful and delighted to have been able to engage in work that contributes to this segment of the electronics industry. Moving forward, I will continue to serve as a conduit for the appropriate information on semiconductors and electronic components, so that I can help realize humanity's great dreams and support the product and information development of our clients. I am committed to walking alongside our clients and growing together in the information society of the 21st century. However, on the other hand, global environmental issues have become increasingly prominent. As a member of society, I feel the importance of leaving a rich natural environment for the future and preserving the fundamental value of humanity. I am determined to strive towards becoming a company that harmonizes with nature and society as we move towards an endless future.

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