【经验】优恩半导体解析陶瓷气体放电管GDT5个选型技巧
陶瓷气体放电管——GDT,有多少人认识的?会选型吗?优恩半导体总结了几个关于放电管选型的方法及注意事项,通过本文五点选型注意技巧,相信你一定能够选到合适的陶瓷气体放电管器件。
图 1 实物图
陶瓷气体放电管如何选型?
第一点:陶瓷气体放电管的续流电压只有几十伏,在供电电路中不能单独使用陶瓷气体放电管。由于电源电路的工作电压大于陶瓷气体放电管的续流电压,GDT陶瓷气体放电管会一直处于开启状态,导致两极之间持续短路,导致电源短路。
第二点:建议共模保护必须与陶瓷气体放电管和MOV压敏电阻串联使用。陶瓷气体放电管和压敏电阻串联使用,整个电路的击穿电压基本等于陶瓷气体放电管的脉冲击穿电压,压敏电阻和陶瓷气体放电管的绝缘电阻差不是一个数量级,所以大部分电压是除以陶瓷气体放电管,陶瓷气体放电管的延续电流电压很低,不能在交流电源输入线的L和N之间使用陶瓷气体放电管。
第三点:GDT陶瓷气体放电管和压敏电阻的组合理论上可以应用在交流电源输入端口L和N之间进行差模保护,但一般陶瓷气体放电管的脉冲击穿电压远高于压敏电阻,导致电路性能较差。模具的残压比使用单个压敏电阻要高,也增加了单板的体积和实际成本。因此,一般情况下差模保护不增加陶瓷气体放电管,只能使用压敏电阻。
第四点:目前GDT陶瓷气体放电管能达到的最低标称直流击穿电压为70V左右。
第五点:5V信号电路:陶瓷气体放电管直流击穿电压最低只有70VDC,但由于放电管放电电流GND为外壳地,需满足500VDC安全绝缘耐压测试要求,考虑正负20%差异在器件的击穿电压中,因此,陶瓷气体放电管直流击穿电压需要大于600VDC。一般陶瓷气体放电管的结电容小于3pF。
通过以上这五点选型注意技巧,相信你一定能够选到合适的陶瓷气体放电管器件。
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本文由三年不鸣转载自优恩半导体,原文标题为:【经验分享】陶瓷气体放电管GDT选型,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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SERIES,14D751KSC,SMD1812-300-16V,SM8Z28A,SMDJ19,ESD12V52D-HA,SMDJ18,SMDJ17,SMDJ16,TPSMB10J16CA,SMDJ15,TPSMBJ,SMDJ14,TPSMB56CA,SMDJ13,SMDJ12,SMDJ11,SMDJ10,SMCJ36A,SMD0805-010-30V,P6KE30,32D621KJ,SMCJ36C,SA190CA,5.0SMDJ75C,5.0SMDJ75A,UNA-SMD,15SMBJ160CA,SMF54CA,TPSMA6J18A,P4SMA91A,P6KE27,TPSMAJ,P6SMB170A,P0300DM,UN1812-390HS,P6KE24,P6KE22,P6KE43,SMCJ45CA,UN3E8-200HSMD,UN0603E,P6KE75CA,P0300EA,P0300EB,P0300EC,P6KE39,TPSMA6J19A,UN2H8,P6KE36,TCF03025U12002A SERIES,P6KE33,10SMBJ64A,SMCJ58CA,P6KE51,TPSMBJ110CA,SMDJ180CA-AT,25D511KJ,SMD1206-300,SMDJ7.5CA,TPSMA75A,UN1812-270HS,5.0SMDJ17A-AT,1.5KE18CA,14D201KJ,UN30-110,BLC03C-4,UN2K8-350L-2,5.0SMDJ70CA,UN2E5,UN2K8-350L-1,SMCJ33A,P6KE47,SMCJ33C,TPSMA6J16A,UN2E8,UN2E8-150HL,P4SMA350A,P6KE62,P4SMA6.8CA,ESD03V23T-LC,ESD03V23T-LA,ESD08V52D-A,15SMBJ180A,14D301K,10SMBT30A,P6KE56,ESD08V52D-C,TPSMA6J17A,5.0SMDJ33CA,UNS3K,UN2E6-SMD SERIES,UN1812-390H,TPSMDJ24CA,20D361K,40D361KJ,4.0SMF13CA,SMDJ160A,SMBJ160CA-AT,TP5.0SMDJ28A,
DC24V电源端口浪涌保护
DC24V电源端口浪涌保护DC24V电源是一种为设备提供稳定、可靠的直流电压输出的电源,其广泛应用于工业自动化控制系统。此方案设计为多级保护的方式,初级采用通流能力较强的陶瓷气体放电管和压敏电阻组合来承受泻放大的浪涌电流,中间使用电感做退耦,次级选用响应电压精准、稳定且快速的TVS管做保护,能有效抑制各类浪涌过电压,使后端的DC芯片及电路得到全面的保护。
应用方案 发布时间 : 2024-01-24
【应用】符合IEC 61000-4-5 Surge的AC36V电源端口浪涌&过压防护解决方案
AC36V电源广泛使用在工矿、船舶等LED电源,设备易遭受气候环境的影响而导致击雷击浪涌及过过压等损坏。本文推荐陶瓷气体放电管与压敏电阻串联搭配使用,可以延长压敏电阻的使用寿命及降低压敏电阻的漏电流,且后端的残压较单级防护降低很多。
应用方案 发布时间 : 2021-05-19
【技术】解析MOV压敏电阻的两大电路防护作用
压敏电阻中电阻的材料为半导体,因此压敏电阻其实也属于一种半导体电阻器。MOV压敏电阻作为一种防护器件,你知道它在电路中发挥着什么样的作用吗?现在本文优恩半导体就带你了解MOV压敏电阻的两大电路防护作用。
技术探讨 发布时间 : 2022-10-14
解析TSS半导体放电管基本概念以及特征表现
本文中优恩半导体将为大家简要解析TSS半导体放电管基本概念以及特征表现。半导体放电管,简称TSS,也有很多人称为固体放电管,它主要应用场景在于信号线路的雷击浪涌防护。TSS半导体放电管与常见的几种放电管(GDT陶瓷气体放电管、SPG玻璃放电管)有所不同,它是一种利用晶闸管原理制成的过压保护器件,主要依靠PN结的击穿电流触发器件的导通和放电。
技术探讨 发布时间 : 2023-11-17
【技术】解析压敏电阻的生产过程
压敏电阻是一种具有特殊性质的电阻器件,它可以在电压变化时产生电阻值的变化,从而起到保护电路的作用。其特殊的电阻性质决定了它具有抗静电、耐高温和高电压等特点,因此在电子、通信、汽车等领域得到了广泛应用。本文优恩半导体介绍压敏电阻的生产过程。
技术探讨 发布时间 : 2023-04-11
ESD0402-0603 Series MULTILAYER CHIP VARISTORS
型号- ESD0402-5R5E500,ESD0402-140E330,ESD0402-5R5E100,ESD0402-5R5E220,ESD0603 SERIES,ESD0402-120E5R0,ESD0402-120E131,ESD0402-5R5E481,ESD0402,ESD0603,ESD0603-140E330,ESD0402-240E2R5,ESD0603-180E0R2,ESD0402-9R0E181,ESD0402-5R5E0R2,ESD0402-140E161,ESD0402-180E150,ESD0402 SERIES,ESD0603-240E2R5,ESD0603-180E0R8,ESD0603-180E5R0,ESD0402-5R5E0R8,ESD0603-5R5E220,ESD-0603-5R5-E-0R2,ESD0603-5R5E100,ESD0402-120E101,ESD0603-5R5E500
14D Series Radial Lead Varistor (MOV)
型号- 14D181K,14D,14D102KJ,14D270K,14D391K,14D330KJ,14D560KJ,14D270KJ,14D821K,14D221KJ,14D470KJ,14D681KJ,14D122K,14D391KJ,14D182KJ,14D102K,14D162K,14D142K,14D121KJ,14D142KJ,14D112KJ,14D390K,14D180L,14D821KJ,14D241KJ,14D820K,14D101K,14D331K,14D561K,14-D-XXX-K-X-X-X-X,14D511KJ,14D751K,14D121K,14D301KJ,14DXXXK,14D101KJ,14D331KJ,14D621KJ,14D561KJ,14D271KJ,14D431KJ,14D201KJ,14D220KJ,14D471KJ,14D621K,14D680KJ,14D751KJ,14D221K,14D112K,14D390KJ,14D560K,14D431K,14D681K,14D162KJ,14D201K,14D471K,14D181KJ,14D241K,14D122KJ,14D330K,14D271K,14D182K,14D361KJ,14D SERIES,14D781KJ,14D820KJ,14D511K,14D911K,14D180LJ,14D911KJ,14D781K,14D151KJ,14D680K,14D470K,14D301K,14D151K,14D361K,14D220K
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加工精度:精密平面磨床正负0.002;铣床正负0.02,ZNC放电正负0.01。CNC加工材料:铝、钢、聚合物等材料。专注于半导体行业、医疗器械、汽车行业、新能源行业、信息技术行业零部件加工。
最小起订量: 1个 提交需求>
可定制UV胶的粘度范围:150~25000cps,粘接材料:金属,塑料PCB,玻璃,陶瓷等;固化方式:UV固化;双固化,产品通过ISO9001:2008及ISO14000等认证。
最小起订量: 1支 提交需求>
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