A 12V DC Lightning Protection Solution from Yint
As the name suggests, the surge is an instantaneous overvoltage that exceeds the normal operating voltage. Its sources are divided into external sources (overvoltage generated on power lines by lightning and switching operations in the power grid) and internal sources (air conditioners, elevators, welding machines, air compressors, and Other inductive loads), according to statistics, in the United States: Direct losses caused by power surges to various industries such as shutdown, time loss, equipment maintenance, premature replacement of equipment, etc. are as high as 26 billion US dollars per year. In China, according to relevant statistics, 63% of electrical products that have problems during the warranty period are due to power surges. Based on the surge (impact) immunity test of GB/T17626.5 IEC61000-4-5, Yint company has compiled and tested the low-voltage DC lightning protection scheme for your reference.
Recommended 12V DC Power Supply Protection Solution
Fig.1
Features
Use a gas discharge tube (large flow device) for rough protection. When there is a ground wire, it is recommended to use a 3-pin gas discharge tube 3R090L(M)-8, but when there is no ground wire, use a 2-pin gas discharge tube 22R090L(M)-8. For fine protection, TVS uses inductors for decoupling, because the response speed of TVS is faster than that of gas discharge tubes. The purpose of using inductors is to discharge most of the energy through gas discharge tubes when a large surge occurs, and the remaining small part remains. The surge is suppressed again by the TVS, finally weakening the surge to a level that the EUT can withstand.
The function of the front-end fuse is to disconnect the circuit in time when an abnormality occurs in the TVS. Select the fuse according to the current of the customer's circuit. Pay attention when selecting the fuse. During the surge test, the instantaneous current is very large, with thousands of amps. At this time, the fuse cannot be disconnected and requires a fuse with strong surge resistance. It is generally recommended to use a slow-blow fuse.
Surge Test Waveform
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本文由三年不鸣转载自Yint News，原文标题为:12V DC Lightning Protection Solution，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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目录- 公司简介 瞬态抑制二极管 静电保护器件 半导体放电管 气体放电管 压敏电阻 自恢复保险丝 热敏电阻 肖特基二极管 整流二极管 高压二极管 稳压二极管 场效应管 霍尔传感器 热保护器 共模滤波器 低压差线性稳压器
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产品型号
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品类
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Minimum Insulation Resistance Test Voltage
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Maximum Capacitance 1MHz
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DC Spark-over Voltage 100V/s
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Nominal Impulse Discharge Current 8/20μs
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Impulse Spark-over Voltage 1KV/µs
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Minimum Insulation Resistance
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Impulse DischargeVoltage 10/700 uS
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SMD1206-091
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50V
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0.3pF
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<750V
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1000MΩ
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4KV
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音特电子（Yint Electronics）气体放电管（GDT）选型指南
描述- YINT provides high-performance and small size packaging (DIP/SMD) gas discharge tubes with fast response speed and surge suppression capability, which reduces the risk of equipment damage, this is also a good choice for protecting devices from damaging by surge current caused by lightning, especially suitable for outdoor telecommunications equipment.
型号- 2R300L-5.5×6,2R470L-5.5×6,2R090L-8×6,2R075S-8×6,2R230S-8×6,3R350L-8×10,2R150L-5.5×6,3R230S-5×7.6,3R400L-5×7.6,SMD1206-401,3R350S-6×8,SMD1812-501,2R300S-8×6,3R150S-6×8,3R300L-8×10,2R200S-8×6,2R400S-8×6,3R150L-6×8,2R600S-8×6,3R600L-6×8,2R400S-6×4.2,SMD1206-471,SMD1812-351,2R***L-5.5×6,SMD1206-351,SMD1812-231,2R090L-5.5×6,3R300L-6×8,2R470S-6×4.2,SMD1206-231,SMD1812-471,3R150L-5×7.6,3R300L-5×7.6,2R075L-8×6,2R300L-8×6,2R090S-8×6,3R090L-8×10,SMD1812-071,3R470L-8×10,3R***L-6×8 SERIES,2R200S-6×4.2,SMD1812-601,3R300S-6×8,2R350S-6×4.2,SMD1812-201,3R400S-6×8,2R470L-8×6,3R230L-6×8,2R350S-8×6,3R200S-5×7.6,3R600L-8×10,2R075S-6×4.2,3R***S-5×7.6 SERIES,SMD1812 SERIES,3R470S-6×8,2R150S-6×4.2,3R400L-6×8,3R470L-6×8,3R350L-6×8,3R200L-8×10,SMD1812,2R230L-8×6,2R***S-8×6 SERIES,2R470S-8×6,2R400L-8×6,2R350L-8×6,3R***S-6×8 SERIES,3R230L-5×7.6,SMD1206-201,2R600L-5.5×6,SMD1812-421,2R***S-6×4.2 SERIES,SMD1812-301,3R090S-6×8,3R400S-5×7.6,2R230S-6×4.2,2R1000L-5.5×6,SMD1206-151,SMD1206 SERIES,3R150S-5×7.6,SMD1812-151,2R600S-6×4.2,2R***L-5.5×6 SERIES,3R200L-5×7.6,3R230S-6×8,3R090L-6×8,2R1000S-6×4.2,3R300S-5×7.6,3R075L-5×7.6,SMD1812-121,3R600S-6×8,3R***S-5×7.6,3R***S-6×8,3R090L-5×7.6,SMD1206-421,2R***S-6×4.2,2R150S-8×6,2R***L-8×6,3R090S-5×7.6,3R200S-6×8,SMD1206-301,3R075S-5×7.6,SMD1206,2R090S-6×4.2,SMD1812-401,3R230L-8×10,2R350L-5.5×6,3R***L-8×10 SERIES,3R350S-5×7.6,3R400L-8×10,2R200L-5.5×6,3R075L-6×8,3R200L-6×8,3R***L-5×7.6,2R230L-5.5×6,3R600S-5×7.6,2R075L-5.5×6,3R470L-5×7.6,3R***L-8×10,3R600L-5×7.6,2R300S-6×4.2,3R470S-5×7.6,2R200L-8×6,3R075L-8×10,3R150L-8×10,3R***L-5×7.6 SERIES,2R400L-5.5×6,3R350L-5×7.6,SMD1812-091,3R075S-6×8,2R***L-8×6 SERIES,2R600L-8×6,SMD1206-091,2R***S-8×6,2R150L-8×6,3R***L-6×8
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支持1拖1/1拖8/eMMC离线烧录，可烧录IC类型：UFS/UMCP/MCU/MPU/EPROM/EEPROM/FLASH/Nand Flash/PLD/CPLD/SD Card/TF Card/ CF Card/eMMC Card/eMMC/eMCP/MoviNand/OneNand等；IC包装Tray/Tube/Tape；提供免费10pcs样品试样。
最小起订量： 1 提交需求>
可烧录IC封装SOP/MSOP/SSOP/TSOP/TSSOP/PLCC/QFP/QFN/MLP/MLF/BGA/CSP/SOT/DFN；IC包装Tray/Tube/Tape；IC厂商不限，交期1-3天。支持IC测试（FT/SLT），管装、托盘装、卷带装包装转换，IC打印标记加工。
最小起订量： 1pcs 提交需求>
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