【技术】关于保险丝常识的有效问答（一）
目前保险丝种类比较常见的就是自恢复保险丝PPTC与一次性保险丝了，关于保险丝呢，不少客户对它也存在很多疑问，本文优恩半导体对此整理出了三个基本常识的有效问答，希望能帮到大家。
下面进行第一个提问：
一、保险丝代表性参数额定电压的意义
事实上，这个问题我们可以从保险丝原理去说明，保险丝的熔断是由流过电路的电流大小决定的，与它的工作电压没有关系，因此，保险丝的额定电压是从安全使用上参考的一个数值，表示保险丝在安全工作状态下它能流过的安全工作电压是多少，一旦超过这个额定数值，保险丝可能会出现被击穿等情况，这样就达不到有效防护电路的作用。
二、保险证中的电压降又是什么？
保险丝的电压降实际上就是保险丝在规定的电流条件下，它两端的一个电压降，反映的是其内阻，这个数值一般来说不应该太大，太大的话会影响电路的系统参数，使得它不能正常的工作。
三、保险丝额定电流是保险丝过热情况下发生熔断时产生的电流吗？
这第三个问题，是大家最容易出错的，保险丝的额定电流并不是保险丝在过热情况下发生熔断时产生的电流！大家要记住了，额定电流只是说它标称的一个安全参考数值，而保险丝在过热情况下发生熔断产生的电流、包括熔断的时间，在产品标准中都会有细致的规定，它会有一个熔断系数范围，而不是一个固定的数值。
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本文由犀牛先生转载自优恩半导体官网，原文标题为:关于保险丝常识的有效问答（一），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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TUBE,半导体放电管,静电放电保护器件,PROTECTION TVS/ESD ARRAYS,SPARK GAP PROTECTORS,CHIP COMMON MODE FILTER PLUS,SIDAC晶闸管,LOW PROFILE TYPE CHIP COMMON MODE FILTER,2电极气体放电管,2-ELECTRODE GAS DISCHARGE TUBE,MOV,RADIAL LEAD RESETTABLE POLYMER PTCS,SILICON BILATERAL VOLTAGE TRIGGERED SWITCH,轴向引线瞬态电压抑制器,火花隙保护器,径向铅金属氧化物压敏电阻,15SMBJ78CA,SMAJ6.0CA,SMAJ40CA,SMBJ20A-AT,SM8Z20A,15KP58A,UN2K8-400SMD,SMD1206-350,SMDJ78CA,UN3E8-75HM,P0300SC-2L,ESD05V02D-CP,UN3E8-75HP,TPSMB30CA,SMDJ16A-AT,15SMBJ7.5CA,UNC-301N-SMD,TPSMCJ18CA,PESD0603E12V,UN6-200,05D511K,20D241KYC,5.0SMDJ85C,SMDJ36CA-AT,5.0SMDJ85A,K2200G,UN0402E18V120P,SMCJ100CA,ESD15V52D-LCF,5KP30C,5KP30A,SMF120CA,SMBJ150CA,SMDJ170A,SM8Z33CA,TP5.0SMDJ28CA,53D681K,SMDJ170C,3KP80CA,UN2K8-800L,UN135-250,SMCJ30C,32D122K,SMCJ30A,UNA-471M,SA180C,SMAJ70CA-AT,K0900G,SM8Z24A,SA180A,4.0SMF5.0A,15KP54A,20D781KJ,SMF190A,P6KE8.2CA,TPSMA82A,P4KE180A,P4KE180C,14D181KSC,ESD24V26T-5L,20D331KYC,P4SMA82CA,SMF3.3A,TP5.0SMDJ15CA,SM8Z22A,MCM3216B SERIES,SMDJ160CA,SMBJ400CA,SMCJ80CA,SMD1812-200-24V,PXXXXLB,PXXXXLC,P6SMB51CA,PXXXXLA,ESD24V26T-4L,4.0SMF12CA,TPSMB43CA,ESD0402-240E2R5,SMDJ400A-AT,TPSMB110CA,ESD08V88D-C,SMCJ220CA,5.0SMDJ64CA-AT,5.0SMDJ80A,SMCJ440A-AT,10SMBJ40CA,5.0SMDJ80C,P4KE SERIES,SMD1206-075-16V,TP5.0SMDJ33A,15KP22CAS,UN2E8-90MSMD,5KP36C,5KP36A,UN135-200,SMCJ170CA-AT,UN3220-511H,ESD05V88D-2LA,SMAJ18CA,SA17CA,UN3E6-470MM,1.5KE170CA,25D122K,5KP90CA,5.0SMDJ160CA-AT,TPSMCJ40CA,SMF,TPSMAJ13CA,UN3E5-XXXL,3KP45CA,07D301K,10SMBT28A,SMD1210-075,UN1812-120H,TPSMBJ20CA,3KP58CA,K2600SD1,TPSMBJ40A,1.5SMC440A,UN3E6-350MM,07D431K,10D471KJ,UNS3220-180K,UN2E8-600MSMD,P6SMB520A,UNS2K SERIES,UN1812-121H,20D911KJ,SMAJ440CA-AT,20D511KYC,P6SMB16CA,P6KE500C,UN250-250,P6KE500A,SMBJ90C,15SMBJ9.0A,UN2220-470HS,ESD12V12D-A,SMBJ90A,ESD12V12D-C,UN3E8 SERIES,SMBJ12CA,TP5.0SMDJ30A,TPSMAJ26CA,UNA SERIES,SMD1210-050,PESD0603E18V,SMDJ11CA-AT,UNS3220-181K,SMBJ5.0A,SMBJ350CA-AT,SMBJ5.0C,TCF03025FH35002A,UN1206-270H,SMD0805-075,UNC-SMD SERIES,20D220K,SMBJ9.0,ESD15V52D-LAF,5.0SMDJ180A-AT,PESD0603E15V,SMD1210-020,UN1210-760H,UN3E8-75HSMD,6.0SMAJ,UN0402E SERIES,UN6-250,TP5.0SMDJ36A,SMBJ58A-AT,SMDT58CA,P4SMA47CA,ESD24V32D-C,UN3E6-230MM,ESD24V32D-A,SMD1210-035,UN2E5-XXXLL,ESD0402-5R5E500,SMD1210-005,07D560K,SMBJ85A-AT,20D,UN250,PXXXXDM,P4KE400A,MCM3216B121,P4KE400C,PXXXXTB SERIES,40D431KJ,ESD03V32D-LCD,10D101K,TPSMBJ33CA,ESD03V32D-LCA,SMCJ90CA-AT,SMD0805-050,ESD03V32D-LCC,07D561K,10SMBJ18CA,TPSMDJ12CA,P6KE27CA,SMBJ30CA-AT,SMCJ120A-AT,PXXXXEC,5KP33A,SMCJ16CAS,UN1210-200BSMD,PXXXXEA,10D102K,34S1000J,PXXXXEB,14D911K,20D221K,SMD1210-150-12V,07D821KJ,SMD1210-010,5KP33C,TPSMA6J13A,20D470KJ,UN2E8-150M,SMDT45CA,15SMBJ17CA,TPSMA6J13CA,SMAJ14A-AT,10SMBT33A,SMD0805-035,ESD05V32D-A,UNB-201N-SMD,TPSMA6J14A,SA9.0,UN3E6-350M,POE SERIES,UN135-1100-S,TPSMBJ33A,SMD0805-020,UN3E8-75H,10D112K,UN135-1100-C,UNB-181N,ESD05V88D-CDN,UN2E8-150H,14D561K,TPSMB91CA,TPSMAJ SERIES,TPSMA6J15A,ESD08V52D-HA,TPSMBJ36A,SMCJ7.5C,SMCJ7.5A,SMAJ400A,SMF19CA,UN3E5-150L,SA90A,UN1812 SERIES,SA90C,10D241K,SMD0805-010,10SMBJ180A,14D431K,LCDA05C-8,LCDA05C-4,25D,P6KE220CA,SA40CA,ESD05V32D-C,HCM1012GD900B05,10SMBT7.5A,ESD05V88D-CBP,10D821KEC,SMD0805-005,UN2E8-150ML,UN1812-760HS,ESD05V88D-CBD,SMCJ64A-AT,SMBJ48CA-AT,P3800TB,TPSMBJ30A,P3800TA,SMDJ90,UN3220-471HS,P6KE100CA,5KP28C,SMDT7.0A,P6SMB SERIES,5KP28A,14D681KJ,TPSMA100A,P3800SC,P3800SB,SMDJ85,6.0SMAJ54CA,ESD30V12D-C,P3800SA,ESD30V12D-A,SMDJ80,SMAJ8.5CA,SMAJ180C,SMAJ180A,UN2E5-90LSMD,TP5.0SMDJ40A,SMDJ75CA-AT,20D122KJ,10SMBT36A,ESD3.3V04D-LC,SMAJ350CA-AT,14D361KSC,5.0SMDJ220A,SMDJ78,UN30-160,UN16-900,ESD05V08P-LC,SMDJ75,25D121K,5KP8.0C,14D561KJ,SMDJ70,5KP8.0A,UN2K8-450L,1.5SMC10A,UN0805-420H,TPSMA6J26CA,SMDJ16CA,SMCJS SERIES,14D560K,SMBJ130C,SMBJ130A,5.0SMDJ350A,SMDJ64,SMDJ60,34S210J,5KP120CA,ESD12V52D-CF,30KP120A,UNS3220 SERIES,SMDJ43A-AT,SMDJ58,UN30-185,SMDJ54,P6KE75,10SMBJ7.0CA,SMDJ51,UN2E5-3600LL,20KP132A,SMAJ160CA-AT,10SMBT7.0A,UN2K8,P6KE62CA,UN30-135,SMDJ48,P6KE68,SMDJ45,SMDJ43,UNB-401M,SMDJ40,TPSMA36CA,P6KE82,ESD15V02D-CKN,5.0SMDJ78C,SMCJ7.0C,SMDT7.5A,5.0SMDJ78A,SMCJ7.0A,SMDJ51CA,5.0SMDJ48CA,UN111B339HWA1DFL,15KP51A,TPSMDJ,SMDJ36,SMDJ33,25D751KJ,P4SMA220A,SMDJ30,10SMBJ60A,P6KE91,KB-380,SM8Z26A,ESD3.3V12D-A,ESD3.3V12D-C,SMD1812-200-16V,TPSMCJ,UN2H8-5000LL,SMDJ28,5KP8.5C,SMDJ26,5KP8.5A,SMDJ24,UN2K8-600,SMDJ22,SMDJ20,UN1210-151H,SMD0805-110-12V,SMBJ11A-AT,07D331KJ,ESD0402M,UN16 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,STB,PDAS,汽车,客户场所设备,VOIP,AUTOMOTIVE,中央局设备,MOTOR PROTECTION,USB外设,SLIC,GENERAL ELECTRONICS,MOTORPROTECTION,报警系统,DIGITAL CAMERAS,MOBILEPHONES,DISK DRIVE,磁盘驱动器,USB HUBS,COMPUTERS AND PERIPHERALS,USB PERIPHERALS,移动电话,DISKDRIVE,PC MOTHERBOARD,SET TOP BOXES,VOICE OVER IP,即插即用保护,IEEE1394PORTS,IP语音,机顶盒,PLUG AND PLAY PROTECTION,SURFACE MOUNTED APPLICATIONS,MOBILE PHONES,PDA系统,PDAS/DIGITAL CAMERAS,直流电源设备,OVER-CURRENT PROTECTION,通用电子学,USB PORTS,电池和端口保护,游戏机端口保护,BATTERY AND PORT PROTECTION,POWER PORTS,GAME CONSOLE PORT PROTECTION,电动机保护,DC POWER SUPPLY EQUIPMENT,USB集线器,CO,计算机和外围设备,USB端口,CUSTOMER PREMISES EQUIPMENT,SUBSCRIBER LINE INTERFACE CIRCUIT,AUTOMOTIVE APPLICATION,AUTOMOTIVE ELECTRONICS,ALARM SYSTEMS,PC主板,CPE,网络电话,电源端口,CENTRAL OFFICE EQUIPMENT,汽车电子,数码相机
自恢复保险丝的自燃现象及响应速度分析
PPTC自恢复保险丝主要应用在一些电子设备的短路和超载防护上，可与常规保险丝串联使用，起到双重保护的作用。在实际应用中，我们也会遇到自恢复保险丝自燃，那么，你知道为什么会出现这种现象吗？
优恩半导体ESD、PPTC、GDT用于CAN总线浪涌保护，可大幅缩减单板占用体积
优恩半导体在本文将对CAN总线浪涌保护之自恢复保险丝选型进行详细的讲解，为工程师们的设计提供理论基础。
SMD0805L系列表面贴装自恢复PTC
该资料介绍了SMD0805L系列表面贴装可恢复PTC（自恢复保险丝）的特性、电气参数、测试程序和环境规格。这些产品适用于空间受限且需要重置保护的应用，具有快速断开、紧凑设计等特点。
优恩半导体 - SURFACE MOUNT RESETTABLE PTCS,表面贴装可复位PTC,PTC,SMD0805XXXL/X,SMD0805-125L,SMD0805-400L,SMD0805-380L /12V,SMD0805L SERIES,SMD0805-200L,SMD0805-075L /2V,SMD0805-175L,SMD0805-260L,SMD0805-200L /12V,SMD0805-110L /12V,SMD0805-300L,SMD0805-400L /12V,SMD0805-150L /12V,SMD0805-125L /12V,SMD0805-175L /12V,SMD0805-260L /12V,SMD0805-300L /12V,SMD0805-350L /12V,SMD0805-075L,SMD0805-110L,SMD0805L,SMD0805-350L,SMD0805-150L,SMD0805-380L,ANALOG LINE CARD,POWER PORTS,PDAS,PDA系统,充电器,数字线路卡,USB PERIPHERALS,DIGITAL CAMERAS,BATTERY PCM,DIGITAL LINE CARD,USB外设,通用电子学,GENERAL ELECTRONICS,模拟线路卡,电源端口,CHARGER,数码相机,蓄电池PCM
UN2410TS系列
该资料介绍了UN2410TS系列保险丝的产品特性、电气特性、环境特性和安装建议。产品适用于多种电子设备电路的过流保护，具有方形陶瓷贴片设计，具备良好的电气性能和环境适应性。
优恩半导体 - UN2410-0100TS,UN2410-0125TS,UN2410-1150TS,UN2410-1400TS,UN2410TS,UN2410-0062TS,UN2410-0250TS,UN2410-1300TS,UN2410-1800TS,UN2410TS SERIES,UN2410-0315TS,UN2410-1250TS,UN2410-0160TS,UN2410-1630TS,UN2410-0500TS,UN2410-0750TS,UN2410-1700TS,UN2410-1200TS,UN2410-1160TS,UN2410-1350TS,UN2410-0050TS,UN2410-0400TS,UN2410-2100TS,UN2410-0630TS,UN2410-0800TS,UN2410-0200TS,UN2410-1500TS,UN2410-1100TS,UN2410-1125TS,UN2410-1315TS,MEDICAL EQUIPMENT,汽车,PORTABLE DVD PLAYER,PC服务器,无线基站,ELECTRONIC EQUIPMENT,LCD 电视,LCD PANEL,PC SERVER,LCD BACKLIGHT INVERTER,液晶面板,电信系统,BATTERY CHARGING CIRCUIT,冷却风扇系统,PDP电视,PDP TV,LCD 面板,PDP面板,网络,等离子电视,电路保护,STORAGE SYSTEM,LCD TV,电子设备,逆变器,GAME MACHINE,LCD背光,TELECOMMUNICATION SYSTEM,医疗器材,NETWORKING,白色家电,便携式DVD播放机,POWER SUPPLY,WIRELESS BASE STATION,存储系统,LCD显示器,COOLING FAN SYSTEM,INDUSTRIAL EQUIPMENT,液晶显示器,PDP PANEL,液晶电视,LCD DISPLAY,办公室自动化设备,液晶背光逆变器,医疗设备,OFFICE AUTOMATION EQUIPMENT,游戏机,电池充电电路,联网,办公自动化设备,PC服务器,电池充电,电源,便携式DVD播放器,工业设备
【应用】优恩半导体推出DC12V电源端口ESD静电放电及过电压低成本防护方案
本文将介绍优恩半导体的DC12V电源端口ESD静电放电及过电压低成本防护方案。此方案采用导通电压精准度高、响应速度快、钳位电压低的TVS瞬态抑制二极管做保护，满足静电放电及雷击浪涌防护需求的同时做到成本优化。
【技术】浅析自恢复保险丝响应时间及自燃现象
PPTC-自恢复保险丝是一种过流保护器件，具有可恢复的特性，主要应用于一些电子设备的短路以及超载防护。它的响应时间是多久?以及它的自燃现象你知道吗?本文将进行简述。
UN2410FS系列
该资料介绍了UN2410FS系列保险丝的产品特性、结构尺寸、应用范围、电气特性、环境特性、安装建议和包装信息。主要包括了产品的物理尺寸、材料构成、电气参数、工作温度范围、安装方法和包装方式等内容。
优恩半导体 - UN2410-1315FS,UN2410-0200FS,UN2410-1250FS,UN2410-1500FS,UN2410-1100FS,UN2410-1125FS,UN2410-0160FS,UN2410-0350FS,UN2410-0080FS,UN2410-1200FS,UN2410-0630FS,UN2410-0400FS,UN2410-1700FS,UN2410-0062FS,UN2410FS SERIES,UN2410-0800FS,UN2410-0250FS,UN2410-2100FS,UN2410-1300FS,UN2410-0315FS,UN2410-0750FS,UN2410-1630FS,UN2410-1800FS,UN2410-0500FS,UN2410-0125FS,UN2410-1160FS,UN2410-1400FS,UN2410FS,UN2410-0050FS,MEDICAL EQUIPMENT,汽车,PORTABLE DVD PLAYER,PC服务器,无线基站,ELECTRONIC EQUIPMENT,LCD PANEL,PC SERVER,LCD BACKLIGHT INVERTER,OFFICE AUTOMATION,液晶面板,电信系统,BATTERY CHARGING CIRCUIT,冷却风扇系统,设备,PDP电视,PDP TV,PDP面板,办公自动化,网络,等离子电视,电路保护,STORAGE SYSTEM,LCD TV,LCD面板,电子设备,逆变器,GAME MACHINE,LCD背光,TELECOMMUNICATION SYSTEM,医疗器材,办公室自动化,LCD电视,NETWORKING,白色家电,便携式DVD播放机,POWER SUPPLY,WIRELESS BASE STATION,存储系统,LCD显示器,COOLING FAN SYSTEM,INDUSTRIAL EQUIPMENT,液晶显示器,PDP PANEL,液晶电视,LCD DISPLAY,液晶背光逆变器,医疗设备,游戏机,电池充电电路,联网,PC服务器,电池充电,EQUIPMENT,电源,便携式DVD播放器,工业设备
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