二极管和三极管的测量
电路中的电子元件主要有二极管、三极管、可控硅和场效应管等,其中最常用的是二极管和三极管。正确判断二极管、三极管的好坏是电工应该掌握的基本技能之一。
一、二极管的测量
1、通常用万用表的Rx100Ω挡或Rx1kΩ挡来测量耐压较低、电流较小的二极管。
2、用万用表的电阻挡测量2AP9型二极管的正、反向电阻时,应选择Rx100Ω挡。如果二极管的正向电阻值在几十欧至几百欧,反向电阻值在几千欧,则说明二极管是好的;如果两次测得的电阻值都很大,则说明此二极管内部已断路;如果电阻值都很小,甚至为零,说明二极管PN结击穿或已短路。
二、三极管的测量
1、三极管放大能力的判断方法
三极管主要起放大作用,三极管放大能力的判断方法是:将万用表调到Rx100Ω挡或Rx1kΩ挡,当测PNP型三极管时,红表笔接集电极,黑表笔接发射极,测出的阻值一般应在几千欧以上,然后在基极和集电极之间串接一个100kΩ的电阻,这时万用表所测的阻值应明显减小。变化越大,说明该三极管的放大能力越强;如果变化很小或根本没有变化,则说明该三极管没有放大能力或放大能力很弱。测量电路如下图所示。
2、三极管基极和类型的判断方法
1)测量锗三极管用Rx100Ω挡,硅三极管用Rx1kΩ挡,先固定红表笔与任意一只管脚接触,黑表笔分别测量其余两只管脚。看能否找到两个小电阻,若不能,再将红表笔移向其他管脚继续测量,直至找到两个小电阻为止。若固定红表笔找不到两个小电阻,可固定黑表笔继续查找。
2)找到两个小电阻后,固定表笔所用的管脚为基极。若固定的表笔为黑表笔,则三极管为NPN型;若固定的表笔为红表笔,则该三极管为PNP型。
3、发射极和集电极的判断方法
1)判断c、e极电阻法用万用表测量除基极以外的两极电阻,交换表笔测两次。
(1)如果是锗三极管,以所测电阻较小的一次为准。若为PNP型三极管,黑表笔所接的为发射极,红表笔所接的是集电极;若为NPN型三极管,黑表笔所接的为集电极,红表笔所接的是发射极。(2)如果是硅三极管,以所测电阻较大的一次为准。若为PNP型三极管,黑表笔所接的为发射极,红表笔所接的是集电极;若为NPN型三极管,黑表笔所接的为集电极,红表笔所接的是发射极。
2)PN结正向电阻法用万用表分别测量两个PN结的正向电阻值,较大的为发射极,较小的为集电极。
3)手指接触法用万用表的两支表笔与基极以外的两只管脚接触。(1)若为PNP型三极管,则用手指接触基极与红表笔所接的那一极,查看指针摆动情况,然后交换表笔测一次,以指针摆动幅度大的一次为准,红表笔所接的为集电极;
(2)若为NPN型三极管,则用手指接触基极与红表笔所接的那一极,查看指针摆动情况,然后交换表笔测一次,以指针摆动幅度大的一次为准,黑表笔所接的为集电极。
4、简易判断方法
用万用表Rx1kΩ电阻挡测量一只能正常放大的三极管,若用红表笔接触b极,黑表笔接触另两只管脚时,测得的电阻均较小,则该三极管是PNP型。用万用表测得三极管任意两极间的电阻均很小,说明该管的两个PN结均被击穿;若阻值为无穷大,则说明管子内部断路;若阻值在几万欧以上,则说明穿透电流较小,管子能正常工作。
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产品型号
|
品类
|
VRRM(V)
|
VRRS(V)
|
VDC(V)
|
IF AV(A)
|
IFSM(A)
|
VF(V)
|
IR(MA)25℃
|
IR(MA)100℃
|
RθJL* (℃/W)
|
RθJL(℃/W)
|
SS12
|
肖特基二极管
|
20V
|
14V
|
20V
|
1A
|
30A
|
0.5V
|
0.2MA
|
50MA
|
28℃/W
|
88℃/W
|
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型号- SMCJ36CA,SA13CA,SMAJ6.0CA,P6KE47A,P8SMB24CA,SMAJ40CA,SMCJ440CA,SMDJ12A,SMDJ43CA,SMBJ8.5CA,SMBJ51A,5KP200A,SMBJ75A,SMF10CA,P6SMB56A,SMDJ13A,SMF170A,P6KE22A,5.0SMDJ170A,SA20A,P8SMB120CA,P8SMB85A,15KP58A,P6KE300A,SMAJ120A,SA24CA,1.5KE440CA,SMAJ110CA,SMAJ51CA,P6KE24A,P8SMB13CA,SMDJ78CA,SMDJ11A,SMF26A,P6SMB30A,SMDJ36A,SMF45CA,1.5KE43CA,P6SMB62CA,SA43A,P6KE6.8CA,15KP51CA,SMCJ14CA,5KP51A,P8SMB60A,5KP75A,SMAJ250A,1.0SMB13CA,SMCJ78A,5KP8.5CA,SMAJ350CA,15KP100A,SMCJ190A,SMAJ64CA,SMDJ10A,P6KE18CA,P6KE82CA,P8SMB48CA,3KP16CA,5.0SMDJ85A,5KP78A,15KP100CA,SMCJ100CA,P6KE160CA,P6SMB100A,5KP,P6KE20A,5KP28CA,SMBJ300A,SA22A,5KP30A,5KP54A,SMF120CA,SMBJ150CA,1.5KE150A,5.0SMDJ45CA,1.0SMB24CA,SMDJ170A,SMAJ70A,SA7.0CA,P6KE530CA,SMAJ75CA,SMDJ10CA,3KP120CA,SMDJ33A,SMF5.0A,SMF24A,SMF48A,SMBJ16CA,15KP33A,5.0SMDJ60A,SMDJ58A,P6SMB170CA,5KP70CA,5KP17CA,SMCJ54A,SA45A,SA48CA,1.5KE220CA,SMCJ30A,P6KE540A,SA11CA,3KP36CA,5.0SMDJ12CA,1.0SMB33CA,P6KE27A,SM8S30CA,SA180A,P6SMB75A,5.0SMDJ58CA,P6SMB51A,SMF12CA,SMF58CA,15KP54A,15KP30A,1.5KE30CA,P6SMB75CA,P8SMB33CA,SMCJ51A,SA40A,SA64A,15KP120CA,SMBJ170CA,SMCJ75A,15KP60CA,15KP78A,SMF140CA,SA22CA,P6SMB9.1CA,P6KE8.2CA,SMAJ100A,SMF22A,P8SMB220CA,3KP100CA,SMDJ30CA,P8SMB22CA,5.0SMDJ170CA,SA110CA,P6SMB7.5CA,SMCJ16CA,1.5KE480A,1.0SMB16A,1.0SMB11CA,SMDJ54A,SMF45A,SMDJ78A,SMDJ160CA,5.0SMDJ36CA,1.5KE7.5A,3KP14CA,SMBJ400CA,SMDJ30A,5KP SERIES,P8SMB180A,SMF36CA,P6SMB120A,3KP,5KP26CA,P8SMB11CA,P6SMB51CA,1.5KE130A,3KP220CA,SMDJ150A,15KP220CA,P6SMB6.8A,1.0SMB22CA,SMAJ90A,SMCJ220CA,SMF20A,SMBJ14CA,SMBJ70A,SM8S43CA,SMDJ54CA,P6SMB8.2A,5KP170CA,SA8.0CA,15KP18CA,SMAJ7.0CA,5KP15CA,1.5KE51A,1.5KE75A,SMAJ8.5A,1.0SMB18A,P6KE100A,SA28A,P6SMB,SMF43A,SA70CA,1.5KE36CA,SM8S36CA,P6KE36CA,SMCJ120CA,5KP12A,5KP36A,SMDJ36CA,SMF14CA,P6SMB16A,1.5KE30A,P8SMB45A,5KP48CA,15KP18A,5KP200CA,3KP5.0A,SMBJ130CA,SMF100CA,SMAJ18CA,5.0SMDJ130A,SM8,SA17CA,1.5KE170CA,15KP200CA,5KP6.5CA,SMDJ75A,3KP48A,5KP90CA,1.5KE47CA,3KP24A,SMF,SMDJ51A,3KP45CA,5KP190CA,SMBJ36CA,SMCJ300A,P6KE47CA,5KP11A,P6KE12CA,P8SMB20CA,P6SMB39A,SMAJ250CA,P6SMB15A,SMCJ18CA,P8SMB20A,SA28CA,3KP12CA,3KP58CA,SMAJ60CA,P6SMB27CA,P8SMB48A,1.5KE56A,SMAJ210A,3KP45A,P8SMB24A,3KP190A,5.0SMDJ30CA,1.5KE12CA,SMDJ120CA,SMBJ190A,P6SMB91CA,5KP14A,P6SMB200CA,SMDJ14CA,SA5.0CA,P8SMB160A,5KP24CA,P6SMB16CA,5.0SMDJ,P8SMB6.0A,3KP22A,SMF40A,SMBJ90A,1.0SMB20CA,SMF64A,SMBJ12CA,SMBJ58CA,P6SMB13A,5KP13A,P8SMB22A,SMAJ130CA,SMBJ350CA,15KP17A,SMCJ70A,5.0SMDJ150CA,SMF80CA,5KP13CA,SMBJ5.0A,SA48A,5.0SMDJ54CA,1.0SMB8.2A,SMDJ45CA,3KP78CA,1.0SMB6.8A,SMCJ100A,SMAJ16CA,P6SMB36A,SMCJ210A,P6SMB12A,SMF16CA,SMAJ5.0CA,P8SMB75CA,5.0SMDJ150A,1.5KE480CA,1.5KE10A,SMCJ60CA,15KP SERIES,SA15CA,SA24A,5.0SMDJ18A,1.5KE33A,P6KE180CA,P6KE510CA,5KP100CA,P6SMB10A,P8SMB8.0A,3KP43CA,3KP28A,5KP7.5CA,P6SMB11A,SMAJ SERIES,SMAJ150CA,P8SMB64CA,P8SMB64A,P8SMB40A,SMDJ5.0A,SA26CA,P6SMB100CA,SA26A,5.0SMDJ78CA,3KP10CA,SMDJ70A,SA130CA,1.5KE12A,1.5KE36A,SMF85A,1.5KE56CA,SMBJ45CA,P8SMB6.5A,P6KE16CA,1.5KE170A,SMBJ170A,5KP58A,SMBJ10CA,SA6.0CA,SMDJ58CA,1.5KE10CA,3KP170A,P8SMB43A,5KP22CA,15KP36A,5KP10A,P6SMB18CA,5.0SMDJ43CA,SMF60A,P6KE,1.5KE11A,SMAJ300A,P6KE91CA,3KP26A,SMDJ12CA,SMBJ250CA,SMDJ190A,1.5KE150CA,P6KE27CA,5KP33A,P6SMB82CA,P6SMB33A,SMCJ90A,5KP180A,5KP11CA,SMBJ5.0CA,P8SMB18A,P6SMB47CA,5.0SMDJ15A,3KP8.0A,5KP6.0A,SMAJ 8.0A,SA51CA,SA150CA,SMBJ220CA,P8SMB8.5A,SA120A,P6KE20CA,15KP280CA,15KP24CA,1.5KE540A,SMAJ16A,15KP160CA,P8SMB9.0CA,SMCJ85CA,SMDJ200CA,SA8.5A,3KP40A,P8SMB17A,SMF70A,SMDJ190CA,5.0SMDJ14A,P6SMB36CA,3KP64A,15KP90A,SMBJ78CA,SM8S26A,3KP64CA,P6KE91A,SMAJ48CA,SMBJ43CA,SMAJ17A,5KP33CA,SMF9.0CA,1.0SMB9.1A,3KP85A,SM8S18CA,SMCJ7.5A,SMAJ400A,SMBJ7.0A,5.0SMDJ17A,SMF19CA,SA90A,SMCJ110A,1.5KE16CA,SA,SMDJ18CA,5.0SMDJ120CA,5KP20CA,SMAJ15CA,SMBJ54CA,P8SMB51CA,1.0SMB43A,P8SMB120A,SMBJ18A,1.5KE300A,5KP220CA,SA75CA,SMAJ14A,P8SMB SERIES,SMBJ150A,SMDJ6.5CA,P8SMB180CA,1.5KE27A,SMAJ90CA,SMCJ8.5CA,P6SMB12CA,SMCJ9.0A,SMAJ300CA,P6KE220CA,3KP6.5A,5.0SMDJ16A,SA40CA,1.5KE27CA,SM8S24A,SMAJ26CA,P8SMB40CA,SMCJ150CA,SMCJ350A,5KP160A,SMBJ100CA,SMAJ15A,P6KE160A,P6SMB120CA,P8SMB14A,3KP43A,5.0SMDJ11A,3KP9.0CA,3KP51CA,1.5KE510CA,SMDJ100CA,P8SMB160CA,P6KE22CA,P6KE100CA,SMBJ16A,SMCJ400CA,1.5KE91CA,SMBJ30CA,P6SMB SERIES,5KP28A,5KP6.5A,15KP22CA,SMAJ36A,5.0SMDJ110A,SMAJ12A,3KP120A,3KP8.5A,SMF90A,5.0SMDJ58A,SMF110A,P8SMB13A,3KP20A,SA60CA,SMAJ8.5CA,SMAJ180A,SMBJ440CA,P6KE68CA,1.5KE130CA,P6KE33CA,P8SMB60CA,SMBJ17A,SMF85CA,P8SMB12A,SMAJ13A,15KP180A,SMBJ120CA,P6KE480CA,P8SMB,15KP160A,P6KE600A,P8SMB16A,SMCJ18A,5KP8.0A,5KP250A,SMCJ130A,5.0SMDJ13A,3KP75CA,5KP64CA,SMBJ14A,8KP SERIES,P6SMB18A,SMAJ13CA,P8SMB100A,SMDJ16CA,SMF180CA,SMAJ58A,SMBJ130A,SMDJ220CA,SMAJ 6.5A,SM8S28A,P8SMB15A,5.0SMDJ36A,SMBJ7.5A,5.0SMDJ12A,5.0SMDJ85CA,3KP40CA,5KP120CA,3KP160CA,SA100A,P6KE11CA,SMAJ24CA,SMBJ15A,P6KE180A,SMAJ400CA,SMAJ170CA,15KP33CA,SMCJ30CA,SMCJ78CA,SMBJ9.0A,SMCJ16A,SA160A,1.0SMB39CA,SMAJ200CA,SMBJ12A,SMF7.5A,5KP40CA,SMBJ36A,P6SMB150A,SMAJ6.0A,5.0SMDJ90CA,P6KE62CA,SMAJ33CA,1.5KE51CA,15KP20CA,1.5KE120A,SMF160CA,SMBJ350A,5.0SMDJ100CA,SMCJ43CA,3KP100A,SMBJ6.5CA,SA7.5CA,SMF130A,SMCJ17A,SMDJ120A,SMCJ300CA,SA20CA,5.
YBZ3D3V3J THRU YBZ3D220J Silicon Planar Zener Diodes
型号- YBZ3D24J,YBZ3D68J,YBZ3D12J,YBZ3D56J,YBZ3D36J,YBZ3D160J,YBZ3D16J,YBZ3D150J,YBZ3D180J,YBZ3D18J,YBZ3D82J,YBZ3D62J,YBZ3D20J,YBZ3D30J,YBZ3D22J,YBZ3D10J,YBZ3D4V7J,YBZ3D5V6J,YBZ3D220J,YBZ3D3V6J,YBZ3D200J,YBZ3D13J,YBZ3D15J,YBZ3D47J,YBZ3D39J,YBZ3D27J,YBZ3D51J,YBZ3D75J,YBZ3D11J,YBZ3D33J,YBZ3D43J,YBZ3D3V9J,YBZ3D8V2J,YBZ3D9V1J,YBZ3D6V2J,YBZ3D91J,YBZ3D120J,YBZ3D110J,YBZ3D3V3J,YBZ3D5V1J,YBZ3D130J,YBZ3D6V8J,YBZ3D7V5J,YBZ3D100J
YAZ1P5D3V3 THRU YAZ1P5D240 Silicon Planar Zener Diodes
型号- YAZ1P5D27,YAZ1P5D100,YAZ1P5D200,YAZ1P5D22,YAZ1P5D47,YAZ1P5D24,YAZ1P5D68,YAZ1P5D30,YAZ1P5D180,YAZ1P5D51,YAZ1P5D10,YAZ1P5D160,YAZ1P5D75,YAZ1P5D91,YAZ1P5D120,YAZ1P5D240,YAZ1P5D4V3,YAZ1P5D16,YAZ1P5D3V3,YAZ1P5D5V1,YAZ1P5D15,YAZ1P5D110,YAZ1P5D3V6,YAZ1P5D18,YAZ1P5D6V2,YAZ1P5D39,YAZ1P5D4V7,YAZ1P5D5V6,YAZ1P5D12,YAZ1P5D56,YAZ1P5D8V2,YAZ1P5D9V1,YAZ1P5D11,YAZ1P5D33,YAZ1P5D36,YAZ1P5D3V9,YAZ1P5D7V5,YAZ1P5D13,YAZ1P5D6V8,YAZ1P5D62,YAZ1P5D43,YAZ1P5D20,YAZ1P5D150,YAZ1P5D82,YAZ1P5D130
音特电子(Yint Electronics)整流二极管选型指南
描述- The rectifier diode is a semiconductor device that utilizes the unilateral conductivity of the PN junction to convert the alternating current into a pulsating direct current. YINT Electronics, a leading manufacturing provider of circuit protector and solutions service, integrates R&D, production, sales and service in one.
型号- RS5MC,FR106W,US2DBF,RS2ABF,US2DF,US1BF,US5JC,RS2GB,US2DB,RS1G,RS1D,RS1B,RS1A,RS2GF,S2MBF,RS1M,RS1J,RS1K,US1AW,US3GF,S3GBF,ES1JW,RS3BBF,US3GB,S5BC,RS5MBF,US3GC,ES2BBF,S5JBF,FR107W,RS3JBF,ES2JBF,S5BBF,S2MB,RS1DF,US5ABF,ES5BC,US5KC,US1BW,S2MF,S1KF,S2DBF,RS3KC,US2BB,US3DC,1N4001W,S3AF,RS3KB,US3DF,S3AC,RS1GF,S3AB,RS3KF,US3DB,ES3DBF,US2BF,ES1JF,US2KBF,ES5AC,RS3JB,RS3JC,1N4002W,RS3JF,RS3ABF,S5DC,S5ABF,US3MBF,RS5DBF,US1AF,RS2G,S1MF,ES2JF,RS2D,RS2A,RS2B,RS2M,RS2K,RS2J,US3BB,ES1GW,S2AF,US3BC,1N4003W,S2GBF,S2AB,RS2KBF,ES3ABF,US3BF,ES2JB,ES1GF,S3DB,S2BB,S3DC,RS1AF,RS3DBF,US2AB,S3BF,1N4004W,S3BB,S3BC,US5GC,S3ABF,S5DBF,US2AF,US5KBF,RS5GBF,ES3JF,S5GC,RS3DB,RS2BB,RS3DC,RS3DF,RS2BF,ES3JBF,US5DC,RS2BBF,RS3GC,S1AF,RS5KC,1N4005W,RS3GB,US2MBF,ES3BBF,RS2JBF,ES3JC,ES3JB,ES2GF,S2DB,RS3GF,S5JC,US5JBF,US3AB,US3GBF,US3AC,S3DF,ES1DW,S2BF,RS2DB,1N4006W,ES2ABF,S5KBF,RS5JC,US1MW,RS3KBF,ES2GB,US3AF,ES1DF,US1MF,RS2DF,US5BBF,RS1BF,RS1MF,1N4007W,US5BC,ES3GBF,S2ABF,ES3GB,ES3GC,ES3GF,RS3AB,US1JF,RS3AF,RS3AC,S1BF,US3BBF,S3KBF,S2DF,RS5ABF,ES1BW,US1KW,US3JBF,US5MBF,ES2DB,ES5JC,US1JW,ES2DF,ES1BF,RS2MBF,S3GF,RS5DC,US2MF,S3GC,US1KF,S5KC,S3GB,US2MB,RS2DBF,ES1D,US2GBF,US2JF,ES1G,ES1J,US2B,US2A,ES1AW,US2K,US2J,US2G,US1GW,US2D,RS2AB,US2JB,S3JF,RS5GC,ES1AF,RS2AF,ES2A,S3JB,US2M,ES2B,S3JC,ES2GBF,S5MBF,US3ABF,S1DF,S3JBF,US5DBF,RS3MBF,US1B,US1A,US5AC,S3BBF,US1J,ES3DB,US1G,ES3DF,US1D,ES2BB,ES3DC,S2GF,RS3BB,RS3BC,US3MF,ES2BF,US2KF,S2GB,FR101W,RS3BF,US1M,S5MC,US3MB,ES1A,US1K,US2KB,US3MC,ES1B,RS3MF,RS2KB,RS3MC,US3JF,RS2KF,US2BBF,RS2GBF,RS3MB,US2JBF,S2JB,ES5GC,ES2AB,S2KBF,US3JB,US3JC,ES2AF,RS5AC,S2JF,FR102W,ES2D,FR103W,US5GBF,RS5KBF,RS2JB,ES2DBF,ES2G,US3KF,US1GF,US3DBF,ES2J,RS2JF,S3KB,ES3BC,ES3BB,S3MBF,US3KB,US3KC,S1GF,ES3BF,S3KF,S3KC,RS2MF,RS1KF,US1DF,S1A,S5AC,FR104W,US2ABF,S1B,S2JBF,S1D,S1G,S1K,RS2MB,S1J,S2BBF,S1M,ES3AB,ES3AC,ES3AF,S1JF,FR105W,S3DBF,S2B,RS5JBF,S5GBF,S2A,S2D,RS1JF,US2GF,S2G,S2J,RS5BBF,S2K,RS3GBF,S2M,US3KBF,S2KB,S3MC,US1DW,S3MB,ES5DC,US5MC,US2GB,S2KF,S3MF,RS5BC
Y5ZP2D2V4 THRU Y5ZP2D75 Silicon Planar Zener Diodes
型号- Y5ZP2D24,Y5ZP2D68,Y5ZP2D47,Y5ZP2D22,Y5ZP2D20,Y5ZP2D43,Y5ZP2D62,Y5ZP2D27,Y5ZP2D13,Y5ZP2D36,Y5ZP2D11,Y5ZP2D33,Y5ZP2D12,Y5ZP2D56,Y5ZP2D75,Y5ZP2D10,Y5ZP2D51,Y5ZP2D30,Y5ZP2D6V8,Y5ZP2D4V7,Y5ZP2D5V6,Y5ZP2D39,Y5ZP2D8V2,Y5ZP2D9V1,Y5ZP2D18,Y5ZP2D15,Y5ZP2D3V9,Y5ZP2D7V5,Y5ZP2D16,Y5ZP2D4V3,Y5ZP2D2V4,Y5ZP2D3V3,Y5ZP2D5V1,Y5ZP2D2V7,Y5ZP2D3V6,Y5ZP2D6V2,Y5ZP2D3V0
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可定制LAMP LED、 CHIP LED、 PLCC LED、 汽车用车规级LED、COB LED的尺寸/电压/电流等参数,电压1.5-37V,电流5-150mA,波长470-940nm。
最小起订量: 30000 提交需求>
可定制单色光灯珠、双色灯珠、全彩灯珠、发光二极管、贴片灯珠、贴片LED等产品,尺寸:0.6*0.3mm-3.2*2.7mm,波长:405-940nm,亮度:24-750mcd,电压:1.5-3.5V。
最小起订量: 3000 提交需求>
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