SMD1812 Series
A. Features 重要特性
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Smaller size saves board space and cost
超小尺寸、节约空间和成本
Resettable circuit protection
自恢复保护、免维护
Fast time-to-trip
动作时间快
Low resistance
低内阻值
Surface mount packaging for automated assembly
贴片式封装,方便自动化生产
Lead-free and compliant with the European Union RoHS Directive 2002/95/EC
符合欧州ROHS无铅环保要求
B. Application 应用范围
Polymer Resettable Fuse for over-current, over-temperature and short-circuit protection
可恢复保险丝用于过流、温度和线路短路保护
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Computer motherboards
计算机主板
IEEE1394 Ports
IEEE1394通讯接口
USB hub, ports and peripherals
USB交换机及外围设备
Phones
电话设备
Data communication
数据交换机
Modems/ Ethernet/LAN
调制解调器/以太网
C. General Description 简要概述
Polymer resettable fuse are made of polymeric PTC materials which is a matrix of
自恢复保险丝是聚合物高分子材料通过特殊工艺而成 ,
polymer containing dispersed conductive particles. Generally, the device has a very
高分子粒子按一定的规律排列,自恢复保险丝器件有低内阻
low resistance. If an over-current happened, as a response to the damage current,
当电路中电流突然增大时,
the resistance will immediately increase to very high, reducing the current of the
器件将会在短时间内阻值升到高阻状态、高分子膨胀
01.06.2015
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