protel元件封装超全总结

responsibleforthedevelopmentofcompanymanagement,includingthedevelopmentofsettlementandsettlementstandardsofpreparation,thebusinessunitclearingworkinspectionandguidance,businesssettlementaudit;23,isinchargeofthecompanybusinessandcostscalculationandanalysisofnewprojectsandtodevelopstandardsandprovidethebasisfordecision-makingandresponsibleforthecomprehensiveeconomicandtechnicalindicatorsandstatistics,analysis,summaryandreporting;24,thecompanyresponsibleforauditsofvarioustypesofbusinesscontracts,theprincipalofcontractprice(purchaseprice,freight,taxes,etc),paymentmethod,payment,settlement,suchasthereasonablenessofthedata,authenticity,accuracy;25,strictenforcementofnationaltaxpolicy,isresponsibleforthemonthlyreporting,includingtaxcalculations,statistics,gothroughtherelevantformalities,receiveinvoices;26,thecompanyresponsibleforallkindsofprice(includingproductprice,materialprices,Freight,engineeringmachineryjobsprice,price,price)'stermsofmarketsurveys,quotations,priceexceptionreport;27,isresponsibleforthecompany'smanagement,includingconferenceorganizedbyprice,ofhistoricalprices,totals,etc;28,accordingtotheannualoperatingplan,annualcostsandundergodecomposition,control,analysisandevaluation;responsibleforcostingandcostcontrol,ensureaccountingnumberisreasonable,correct,andcompleteaccountingreportandthecompany'sotherreportscompiledandreportedtowork;不忘初心，就是始终坚持为人民服务的爱心。党的根基在人民、党的力量在人民，为此，就需要坚持一切为了人民、一切依靠人民。这让我想到了被赞为“农民的代言人”、“最敢为农民说话的代表”毛丰美同志、被誉为“太行新愚公”的李保国同志protel元件封装总结电阻：RES1，RES2，RES3，RES4；封装属性为axial系列:AXIAL0.3-AXIAL0.7其中0.4-0.7指电阻的长度，一般用AXIAL0.4无极性电容：cap;封装属性为RAD-0.1到rad-0.4其中0.1-0.3指电容大小，一般用RAD0.1电解电容：electroi;封装属性为rb.2/.4到rb.5/1.0一般100uF用RB.1/.2,100uF-470uF用RB.2/.4,470uF用RB.3/.6电位器：pot1,pot2；封装属性为vr-1到vr-5二极管：diode封装属性为diode-0.4(小功率）diode-0.7(大功率）发光二极管：LED;LED-3LED-5稳压管ZENER/DIODE;SCHOTTKY三极管：常见的封装属性为to-18（普通三极管）to-22(大功率三极管）to-3(大功率达林顿管）电源稳压块有78和79系列；78系列如7805，7812，7820等79系列有7905，7912，7920等常见的封装属性有to126h和to126v整流桥：BRIDGE1,BRIDGE2:封装属性为D系列（D-44，D-37，D-46）集成块：DIP8-DIP40,其中８－４０指有多少脚，８脚的就是DIP8晶振CRYSTAL或XTAL;XTAL1晶体管、FET、UJTTO-xxx(TO-3,TO-5)可变电阻（POT1、POT2）VR1-VR5responsibleforthedevelopmentofcompanymanagement,includingthedevelopmentofsettlementandsettlementstandardsofpreparation,thebusinessunitclearingworkinspectionandguidance,businesssettlementaudit;23,isinchargeofthecompanybusinessandcostscalculationandanalysisofnewprojectsandtodevelopstandardsandprovidethebasisfordecision-makingandresponsibleforthecomprehensiveeconomicandtechnicalindicatorsandstatistics,analysis,summaryandreporting;24,thecompanyresponsibleforauditsofvarioustypesofbusinesscontracts,theprincipalofcontractprice(purchaseprice,freight,taxes,etc),paymentmethod,payment,settlement,suchasthereasonablenessofthedata,authenticity,accuracy;25,strictenforcementofnationaltaxpolicy,isresponsibleforthemonthlyreporting,includingtaxcalculations,statistics,gothroughtherelevantformalities,receiveinvoices;26,thecompanyresponsibleforallkindsofprice(includingproductprice,materialprices,Freight,engineeringmachineryjobsprice,price,price)'stermsofmarketsurveys,quotations,priceexceptionreport;27,isresponsibleforthecompany'smanagement,includingconferenceorganizedbyprice,ofhistoricalprices,totals,etc;28,accordingtotheannualoperatingplan,annualcostsandundergodecomposition,control,analysisandevaluation;responsibleforcostingandcostcontrol,ensureaccountingnumberisreasonable,correct,andcompleteaccountingreportandthecompany'sotherreportscompiledandreportedtowork;不忘初心，就是始终坚持为人民服务的爱心。党的根基在人民、党的力量在人民，为此，就需要坚持一切为了人民、一切依靠人民。这让我想到了被赞为“农民的代言人”、“最敢为农民说话的代表”毛丰美同志、被誉为“太行新愚公”的李保国同志贴片电阻0603表示的是封装尺寸与具体阻值没有关系但封装尺寸与功率有关通常来说02011/20W04021/16W06031/10W08051/8W12061/4W电容电阻外形尺寸与封装的对应关系是:0402=1.0x0.50603=1.6x0.80805=2.0x1.21206=3.2x1.61210=3.2x2.51812=4.5x3.22225=5.6x6.5关于零件封装我们在前面说过，除了DEVICE。LIB库中的元件外，其它库的元件都已经有了固定的元件封装，这是因为这个库中的元件都有多种形式：以晶体管为例说明一下：晶体管是我们常用的的元件之一，在DEVICE。LIB库中，简简单单的只有NPN与PNP之分，但实际上，如果它是NPN的2N3055那它有可能是铁壳子的TO—3，如果它是NPN的2N3054，则有可能是铁壳的TO-66或TO-5，而学用的CS9013，有TO-92A，TO-92B，还有TO-5，TO-46，TO-52等等，千变万化。还有一个就是电阻，在DEVICE库中，它也是简单地把它们称为RES1和RES2，不管它是100Ω还是470KΩ都一样，对电路板而言，它与欧姆数根本不相关，完全是按该电阻的功率数来决定的我们选用的1/4W和甚至1/2W的电阻，都可以用AXIAL0.3元件封装，而功率数大一点的话，可用AXIAL0.4,AXIAL0.5等等。现将常用的元件封装整理如下：电阻类及无极性双端元件AXIAL0.3-AXIAL1.0当然，我们也可以打开C:\Client98\PCB98\library\advpcb.lib库来查找所用零件的对应封装。这些常用的元件封装，大家最好能把它背下来，这些元件封装，大家可以把它拆分成两部分来记如电阻AXIAL0.3可拆成AXIAL和0.3，AXIAL翻译成中文就是轴状的，0.3则是该电阻在印刷电路板上的焊盘间的距离也就是300mil（因为在电机领域里，是以英制单位为主的。同样的，对于无极性的电容，RAD0.1-RAD0.4也是一样；对有极性的电容如电解电容，其封装为RB.2/.4，RB.3/.6等，其中“.2”为焊盘间距，“.4”为电容圆筒的外径。responsibleforthedevelopmentofcompanymanagement,includingthedevelopmentofsettlementandsettlementstandardsofpreparation,thebusinessunitclearingworkinspectionandguidance,businesssettlementaudit;23,isinchargeofthecompanybusinessandcostscalculationandanalysisofnewprojectsandtodevelopstandardsandprovidethebasisfordecision-makingandresponsibleforthecomprehensiveeconomicandtechnicalindicatorsandstatistics,analysis,summaryandreporting;24,thecompanyresponsibleforauditsofvarioustypesofbusinesscontracts,theprincipalofcontractp