NTCNTCTHERMISTOR2412001500B=lnRT1RT1RT2RT2/()1T1T1T11T2T2T2=lnNTCRtR2525BBTRT1RT2B25(298.15K)50(323.15K),BT1T2TR-TT(K)BBTTB=lnRT1RT1RT2RT2/()1T1T1T11T2T2T2=lnT=1RTDRDTTBT2=T=1RTDRDTTBT2=OUTLINEThisisaNegativeTemperatureCoefficientResistorWhoseresistancechangeswithambienttemperaturechanges.Thermistorcomprises2or4kindsofmetaloxidesofiron,nickel,cobalt,manganeseandcopper,beingshapedandSinteredathightemperature(1200to1500)CriticalTechnicalParametersofNTCThermistorRt---ResistanceValueatZero-powerIt'saresistancewhichisgotatafixedtemperatureonabasisofatestingpowerwhichcausesresistancetoVaryinarangewhichcanbeignoredinrelationtothetotaltestingeror.R25---ResistanceValueatRatedZero-powerThedesignresistanceofthethermistorusuallyreferstotheresistancevaluegotatZero-powerat25,whichisusuallyindicatedonthethermistor.BValueBvaluestandsforthethermalexponentatanegativetemperaturecoefficient.lt'sdefinedasaratioofthebalancebetweenthenaturallogarithmsofresistancevaluesatzero-powertothebalancebetweenthereciprocalsofthetwotemperatures.Theformulaisasbelow:Resistance-to-TemperatureCoefficientatZero-powerItreferstotheratioofchangesofathermistor.ResistancevalueatZero-powerwhenThetemperature,totheresistancevalueatZero-powerTheformulaisasbelow:Inthisformula,""standsfortheresistance-temperaturecoefficientatZero-powerwhenthetemperatureisT:RstandsfortheresistancevalueatZero-powerwhenthetemperatureisTTstandsforthetemperature(inK)BstandsforBvalueTInthisformula:RistheresistanceatZero-powerwhenthetemperatureisTRistheresisrtanceatZero-powerwhenthetemperatureisTUnlessotherwisespecified,BvalueisgotbycalculatingtheZero-powerresistancesat25(298.15K)and50(323.15K).It'snotafirmconstantwithintherangeofworkingtemperature.T11T22149NTCNTCTHERMISTORwww.nscn.com.cn【南京南山半导体有限公司—风华高科热敏电阻器选型资料】150,=P/T63.2%C=C/DissipationCoefficientIt'stheratioofthechangeswithathermistordissipationpower,inapre-setambienttemperature,tothechangeswiththetemperature.Theformulaisasbelow:=P/Tchangesinresponsewhentheambienttemperaturechanges,withintherangesoftheworkingtemperature.APPLICATIONSThermalTimeConstant=C/AtZero-powerandwhenamutatiooccurswiththetemperature,thetime"t",whichis-spentforfinishing63.2%ofthegapbetweenthebeginningtemperatureandtheendingtemperatureinthethermistor.isdirectlyproportionalto"c",theheatcapacityofthethermistor,andisinverselyproportionalto,thedissipationconstant.Thatis"".UPSmaxMax.steadystatecurrent..max.Themaximumallowablecontinuouscurrentpassingthroughthermistorat25.Conversionpowersupply,switchpower,UPSpower,Kindsofelectricheter,electronicenergy-savinglamps,electronicballastetcallkindsofpowercicuitproterctionofelectronicequipments,filamentproterctionofCRT,bulbandotherlightinglamps.www.nscn.com.cn【南京南山半导体有限公司—风华高科热敏电阻器选型资料】151(NTC)BDIMENSIONS(mm)132AE0.6Remarks:E"valuemaybe0.6forresistorsforwhichthechip'sdiameteris13andtheworkingcurrentis2A."HOWTOORDERSurge-ArrestorNTCThermistorFEATURESSmallinsize,high-powered,andverycapableofbringingdownthesurgecurrent;Quickinreaction;HighinBvalueandlowinresidualcurrent;Longservicelifeandhighreliability;Highcoefficientofsafetyandwiderangeofapplication.NegativeTemperatureCofficientResistor10ResistanceValue:1013DiameterofChip:13NTC10D-13Type(mm)AMAXC1DMAXE0.05FMAXD-20D-15D-13D-11D-92216.514.512.510.57.5/107.57.57.57.5766551.01.00.80.80.844444ADFCED-78.55.050.54NTCNTCTHERMISTORwww.nscn.com.cn【南京南山半导体有限公司—风华高科热敏电阻器选型资料】152SPECIFICATIONS&PROPERTIESModelR2520%()(A)Max.Steady-current(A)PowerDissipationcoe-fficient(mW/)TimeConstant(s)NTC5D-7NTC8D-7NTC10D-7NTC16D-7NTC22D-7NTC2.5D-9NTC3D-9NTC5D-9NTC8D-9NTC10D-9NTC16D-9NTC22D-9NTC25D-9NTC35D-9NTC50D-9NTC60D-9NTC80D-9NTC100D-9NTC120D-9NTC200D-9NTC300D-9NTC2.5D-11NTC3D-11NTC5D-11NTC8D-11NTC10D-11NTC16D-11NTC2.5D-13NTC3D-13NTC5D-13NTC10D-13NTC16D-13NTC3D-15NTC4D-15NTC5D-15NTC8D-15NTC10D-15581016222.535810162225355060801001202003002.535810162.53510163458100.2410.4360.5720.8971.0830.1280.1330.2360.3820.4670.6880.8990.9141.1031.2651.5212.1082.5763.1155.9009.1500.1200.1260.2280.3010.3950.4880.0990.1120.1360.2710.3680.0940.1280.1320.1960.25510999811111111111111121211111111111010131313131414131415151618202020203028272727353535343432303030303030303032324645454547506060686560767676808521.510.70.6443221111110.80.80.80.50.55543326654376655()ApproxRofMax.Cur.()NTC8D-1380.25615654NTC16D-15160.30719774NTC3D-2030.079241008NTC5D-2050.10623877NTC8D-2080.157231056NTC10D-20100.194231186www.nscn.com.cn【南京南山半导体有限公司—风华高科热敏电阻器选型资料】
