Diotec‘s P4SMAJ30CA-AQ TVS Offers 30V of Working Voltage and 400W of Peak Pulse Power for Sensitive Onboard Electronics
A long time ago, a ship offshore was totally disconnected from the rest of the world. Short distances could be spanned by optical signals like flags, mirrored sunlight or flare, but required clear view. The world's first radio transmission at all (and from an island!) was done by Guglielmo Marconi 1897, using a spark-gap transmitter. The principle of that set-up was detected just few years ago, 1887 by Heinrich Hertz: An electric spark creates radio waves which spread into the air.
The still used German term "Funkübertragung" for radio transmission stems from that spark-gap effect. In 1901, Marconi managed already to send a message across the Atlantic ocean - this was the start for successful marine communications. Even small boats use nowadays maritime radio systems, supplied by the onboard 12 or 24 V battery system. Like in a car supply, the disconnection of the battery (also called load dump) can cause voltage spikes exceeding easily 100 V. At sea there is further the risk of lightning strikes hitting the radio antenna.
Transient Voltage Suppressor diodes (TVS) are therefore used to protect the sensitive onboard electronics. The P4SMAJ30CA-AQ is a typical TVS used in the second level of protection, that means at the interfaces of an electronic circuit, in addition to centralized load dump protectors and lightning arresters. It offers 30V of working voltage, well above the 28 Volt of a fully charged 24V battery, and 400W of peak pulse power at the typical lightning pulse 10/1000µs.
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本文由Devor转载自Diotec News，原文标题为:Safe Communication Offshore，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。
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DIOTEC ESD Protection&Transient Voltage Suppressor Diodes选型表
提供了Diotec ESD保护二极管&瞬态电压抑制器二极管选型，Junction Temperature Tjmax[℃]：125-200℃，Maximum Clamping Voltage IPPM[A]：0-446A
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产品型号
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品类
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Type
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Package
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Breakdown Voltage VBRmin[V]
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Breakdown Voltage VBRmax[V]
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Breakdown Voltage IT[mA]
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Peak Pulse Power Dissipation PPPM[W]
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Junction Temperature Tjmax[℃]
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Stand-off Voltage VWM[V]
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Maximum Reverse Current ID @ VWM[µA]
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Maximum Clamping Voltage Vc[V]
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Maximum Clamping Voltage IPPM[A]
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1.0SMBJ28CA
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Transient Voltage Suppressor Diodes
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SMD
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DO-214AA/SMB
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31.10
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34.40
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1
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1000
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150
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28.0
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1.000
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45.40
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22.00
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选型表 - DIOTEC 立即选型
TVS Diodes for Almost All Kind of Applications - High Performance Protection for Green and Sustainable Technologies
To design sustainable or “green“ technologies means also to ensure longest possible lifetimes of electronic devices, once they are produced. An important item is here the protection against transient voltage peaks, as they occur on the power grid in case of lightning strikes. Transient Voltage Suppressors (TVS) prevent high voltage surges from damaging sensitive electronic circuits. Diotec offers TVS Diodes for almost all kind of applications, and from low up to very high voltage levels. Check out our latest Application Note to find the optimal TVS solution for your project.
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