A. Features
重要特性
♦ Smaller size saves board space and cost
小尺寸、節(jié)約空間和成本
♦ Resettable circuit protection
自恢復(fù)保護(hù)、免維護(hù)
♦ Fast time-to-trip
動(dòng)作時(shí)間快
♦ Low resistance
低內(nèi)阻值
♦ Lead-free and compliant with the European Union RoHS Directive 2002/95/EC
合歐州ROHS無鉛要求
B. Application
應(yīng)用范圍
Polymer Resettable Fuse for over-current, over-temperature and short-circuit protection
可恢復(fù)保險(xiǎn)絲用于過流、溫度和線路短路保護(hù)
♦ Loudspeaker、VCD、DVD、Transformers、Automotive electronics、Electronic toys、Motors
音響喇叭、VCD、DVD機(jī)、變壓器、汽車電子、電子玩具、馬達(dá)（電動(dòng)工具）
♦ IEEE1394 Ports
IEEE1394通訊接口
♦ U hub, ports and peripherals
U交換機(jī)及外圍設(shè)備
♦ Phones
電話設(shè)備
♦ Data communication
數(shù)據(jù)交換機(jī)
♦ Modems/ Ethernet/LAN
調(diào)制解調(diào)器/以太網(wǎng)
C. General Description
簡要概述
Polymer resettable fuse are made of polymeric PTC materials which is a matrix of
自恢復(fù)保險(xiǎn)絲是聚合物高分子材料通過工藝而成，
polymer containing dispersed conductive particles. Generally, the device has a very
高分子粒子按的規(guī)律排列，正常情況下，自恢復(fù)保險(xiǎn)絲器件處于低內(nèi)阻狀態(tài)，
low resistance. If an over-current happened, as a response to the damage current,
當(dāng)電路中電流突然時(shí)，
the resistance will immediately increase to very high, reducing the current of the
器件將會(huì)在短時(shí)間內(nèi)阻值升到高阻狀態(tài)、高分子膨脹
circuit to a safe value that the loading can carry. Once fault to the circuit is out
從而起到減少過電流；
and power is recuperated, the polymer will deflate itself , the device will reset and is
一旦故障排除后，高分子將會(huì)恢復(fù)正常規(guī)則排序。
ready for normal operation.