西玛可控硅晶闸管N1663CH30 N3839TC300
βoff≈10×n1/n2
此式的优点是,不需要具体计算IAT、IG之值,只要读出二者所对应的表针正向偏转格数,即可迅速估测关断增益值。
注意事项编辑
(1)在检查大功率GTO器件时,建议在R×1档外边串联一节1.5V电池E′,以提高测试电压和测试电流,使GTO可靠地导通。
(2)要准确测量GTO的关断增益βoff,必须有专用测试设备。但在业余条件下可用上述方法进行估测。由于测试条件不同,测量结果仅供参考,或作为相对比较的依据。
逆导晶闸管RCT(Reverse-ConductingThyristir)亦称反向导通晶闸管。其特点是在晶闸管的阳极与阴极之间反向并联一只二极管,使阳极与阴极的发射结均呈短路状态。由于这种特殊电路结构,使之具有耐高压、耐高温、关断时间短、通态电压低等优良性能。例如,逆导晶闸管的关断时间仅几微秒,工作频率达几十千赫,优于快速晶闸管(FSCR)。该器件适用于开关电源、UPS不间断电源中,一只RCT即可代替晶闸管和续流二极管各一只,不仅使用方便,而且能简化电路设计。
逆导晶闸管的符号、等效电路如图1(a)、(b)所示。其伏安特性见图2。由图显见,逆导晶闸管的伏安特性具有不对称性,正向特性与普通晶闸管SCR相同,而反向特性与硅整流管的正向特性相同(仅坐标位置不同)。
逆导晶闸管的典型产品有无线电公司(RCA)生产的S3900MF,其外形见图1(c)。它采用TO-220封装,三个引出端分别是门极G、阳极A、阴极K。S3900MF的主要参数如下:
断态重复峰值电压VDRM:>750V
通态平均电流IT(AV):5A
通态电压VT:3V(IT=30A)
反向导通电压VTR:<0.8V
门极触发电压VGT:4V
门极触发电流IGT:40mA
关断时间toff:2.4μs
通态电压临界上升率du/dt:120V/μs
通态浪涌电流ITSM:80A
利用万用表和兆欧表可以检查逆导晶闸管的好坏。
N850CH30 N2418ZC300
N850CH32 N2418ZC320
N850CH34 N2418ZC340
N850CH36 N2418ZC360
N880CH24 N2543ZC240
N880CH26 N2543ZC260
N880CH28 N2543ZC280
N880CH30 N2543ZC300
N900CH20 N3012ZC200
N900CH24 N3012ZC240
N900CH26 N3012ZC260
N1400CH02 N3533ZC140
N1400CH04 N3533ZC160
N1400CH06 N3533ZC180
N1400CH08 N3533ZC200
N1400CH10
N1400CH12
N1400CH14
N1400CH16
N1400CH18
N1400CH20
N1600CH08 N4085ZC080
N1600CH10 N4085ZC100
N1600CH12 N4085ZC120
N1463CH36 N3476TC360
N1463CH38 N3476TC380
N1463CH40 N3476TC400
N1463CH42 N3476TC420
N1663CH30 N3839TC300
N1663CH32 N3839TC320
N1663CH35 N3839TC350
N1863CH20 N4400TC200
N1863CH24 N4400TC220
N1863CH26 N4400TC240
N1863CH28 N4400TC260
N1863CH22 N4400TC280
N1483CH36 N4151FC360
N1483CH38 N4151FC380
N1483CH40 N4151FC400
N1483CH42 N4151FC420
N1683CH29 N4803FC300
N1683CH30 N4803FC320
N1683CH32 N4803FC340
N1683CH35 N4803FC350
N1883CH20 N5177FC200
N1883CH22 N5177FC220
N1883CH24 N5177FC240
N1883CH26 N5177FC260
N1883CH28 N5177FC280
N1983CH18 N5946FC180
N1983CH20 N5946FC200
N1983CH22 N5946FC220
R210SH10 R0487YS10D
R210SH12 R0487YS12D
R0487YS10E R0487YS14D
R0487YS12E R0487YS10F
R0487YS14E R0487YS12F
R0487YS14F R0633YS12F
R185SH08 R0577YS08C
R185SH10 R0577YS10C
R185SH12 R0577YS12C
R0577YS08D R0577YS08E
R0577YS10D R0577YS10E
R0577YS12D R0577YS12E
R216SH08 R0633YS10D
R216SH10 R0633YS12D
R216SH12 R0633YS10E
R0633YS10F R0633YS12E
R181SH14 R0717LS14G
R181SH16 R0717LS16G
R0717LS14H R0717LS16H
R0717LS14J R0717LS16J
R181SH14 R0717LS14G
R181SH16 R0717LS16G
R0717LS14J R0717LS14H
R0717LS16J R0717LS16H
R175SH20 R0736LS20J
R175SH22 R0736LS22J
R175SH24 R0736LS24J
R175SH25 R0736LS25J
R0736LS20K R0736LS20L
R0736LS20K R0736LS22L
R0736LS20K R0736LS24L
R0736LS20K R0736LS25L
R0736LS20M R0736LS24M
R0736LS22M R0736LS25M
R180SH06 R0809LS06A
R180SH08 R0809LS08A
R180SH10 R0809LS10A
R0809LS06B R0809LS08B
R0809LS10B R0809LS06C
R0809LS10C R0809LS08C
R190SH10 R0830LS10D
R190SH12 R0830LS12D
R190SH14 R0830LS14D
R0830LS10E R0830LS10F
R0830LS12E R0830LS12F
R0830LS14E R0830LS14F
R0830LS10G R0830LS12G
R0830LS14G
R200SH16 R0878lS16K
R200SH18 R0878lS18K
R200SH21 R0878lS21K
R0878lS16M R0878lS18M
R0878lS21M
R219SH08 R0929LS08C
R219SH10 R0929LS10C
R219SH12 R0929LS12C
R0929LS08D R0929LS10D
R0929LS12D R0929LS08E
R0929LS10E R0929LS12E
R220SH08 R0964LS08D
R220SH10 R0964LS10D
R220SH12 R0964LS12D
R0964LS08E R0964LS10E
R0964LS12E R0964LS08F
R0964LS10F R0964LS12F
R270SH04 R0990lS04A
R270SH06 R0990lS06A
R270SH08 R0990lS08A
R0990lS04B R0990lS04C
R0990lS06B R0990lS06C
R0990lS08B R0990lS08C
D315CH32 R1127NC32R
D315CH34 R1127NC34R
D315CH36 R1127NC36R
R1127NC32S R1127NC32T
R1127NC34S R1127NC34T
R1127NC36S R1127NC36T
R305SH14 R1124NS14K
R305SH16 R1124NS16K
R305SH18 R1124NS18K
R305SH20 R1124NS20K
R305SH21 R1124NS21K
R1124NS14M R1124NS16M
R1124NS18M R1124NS20M
R1124NS21M
D350SH24 R1158NS24N
D350SH26 R1158NS26N
R1158NS24P R1158NS26P
R350SH08 R1211NS08D
R350SH10 R1211NS10D
R350SH12 R1211NS12D
R1211NS08E R1211NS10E
R1211NS12E
R325SH10 R1178NS10E
R325SH12 R1178NS12E
R325SH14 R1178NS14E
R1178NS10F R1178NS10G
R1178NS12F R1178NS12G
R1178NS14F R1178NS14G
R355SH08 R1271NS08D
R355SH10 R1271NS10D
R355SH12 R1271NS12D
R1271NS08E R1271NS08G
R1271NS10E R1271NS10G
R1271NS12E R1271NS12G
R395SH14 R1275NS14L
R395SH16 R1275NS16L
R395SH18 R1275NS18L
R395SH20 R1275NS14M
R395SH21 R1275NS16M
R1275NS18M
D391SH22 R1279NS22J
D391SH24 R1279NS24J
D391SH25 R1279NS25J
R1279NS22K R1279NS24K
R1279NS25K R1279NS22M
R1279NS24M R1279NS25M
D390SH18 R1280NS18J
D390SH20 R1280NS20J
D390SH22 R1280NS22J
D390SH25 R1280NS25J
R1280NS18K R1280NS18M
R1280NS20K R1280NS20M
R1280NS22K R1280NS22M
R1280NS25K R1280NS25M
D450SH10 R1331NS10B
D450SH12 R1331NS12B
R1331NS10C R1331NS10D
R1331NS10C R1331NS12D
R400SH08 R1446NS08E
R400SH10 R1446NS10E
R400SH12 R1446NS12E
R1446NS08F R1446NS08G
R1446NS10F R1446NS10G
R1446NS12F R1446NS12G
D405SH14 R1448NS14H
D405SH16 R1448NS16H
D405SH18 R1448NS18H
D405SH20 R1448NS20H
R1448NS14J R1448NS14L
R1448NS16J R1448NS16L
R1448NS18J R1448NS18L
R1448NS20J R1448NS20L
R500CH20 R2475ZC20N
R500CH24 R2475ZC22N
R500CH26 R2475ZC24N
R500CH28 R2475ZC26N
R500CH22 R2475ZC28N
R600CH18 R2619ZC18J
R600CH20 R2619ZC20J
R600CH22 R2619ZC22J
R600CH24 R2619ZC24J
R600CH25 R2619ZC25J