PSDT70/16只要用万用表测量一下三个极之间的电阻值就可以。 　　
阳极与阴极之间的正向和反向电阻在几百千欧以上，
阳极和控制极之间的正向和反向电阻在几百千欧以上（它们之间有两个P-N结，而且方向相反，
因此阳极和控制极正反向都不通）。 　　

PSCH75/14
PSCH85/08
PSCH85/12
PSCH85/14
PSCH85/16
PSCH125/12
PSCH125/14
PSCH125/16

PSD50/08
PSD50/12
PSD50/14
PSD50/16
PSD50/18
PSD51/08
PSD51/12
PSD51/14
PSD51/16
PSD51/18
PSD55/08
PSD55/12
PSD55/14
PSD55/16
PSD55/18
PSD61/08
PSD61/12
PSD61/14
PSD61/16
PSD61/18
PSD63/08
PSD63/12
PSD63/14
PSD63/16
PSD63/18
PSD75/08
PSD75/12
PSD75/14
PSD75/16
PSD75/18
PSD83/08
PSD83/12
PSD83/14
PSD83/16
PSD83/18
PSD95/08
PSD95/12
PSD95/14
PSD95/16
PSD95/18
PSDH75/08
PSDH75/12
PSDH75/14
PSDH75/16
PSDH90/08
PSDH90/12
PSDH90/14
PSDH90/16
PSDT39/08
PSDT39/12
PSDT70/08
PSDT70/12
PSDT70/14
PSDT70/16
PSDT74/08
PSDT74/12
PSDT74/14
PSDT74/16

FF600R17KE3_B2
FF800R17KE3
FF800R17KE3_B2
FF1200R17KE3
FF1200R17KE3_B2
FF400R16KF4
FF600R16KF4
FF400R17KF6C_B2
FF401R17KF6C_B2
FF600R17KF6C_B2
FF800R17KF6C_B2
FF650R17IE4
FF1000R17IE4
FF150R17ME3G
FF225R17ME3
FF300R17ME3
FF450R17ME3
BSM50GD170DL
BSM75GD170DL
FS50R17KE3_B17
FS75R17KE3
FS100R17KE3
FS150R17KE3G
FS225R17KE3
FS300R16KF4
FS300R17KE3
FS450R17KE3
FD400R16KF4
FD401R17KF6C_B2
FD600R16KF4
FD600R17KE3_B2
FD600R17KF6C_B2
FD800R17KE3_B2
FD800R17KF6C_B2
FD1200R17KE3-K_2_0
FD1200R17KE3-K_B2
FZ400R33KF2_B5
FZ800R33KF2C
FZ1200R33KF2C
FZ1200R33KF2_B5
FZ400R33KL2C_B5
FZ800R33KL2C
FZ800R33KL2C_B5
FZ1000R33HL3
FZ1500R33HL3
FZ1200R33KL2C_B5
FZ1200R33KL2C
FZ1500R33HE3
FF400R33KF2C
FF200R33KF2C
FD400R33KF2C
FD400R33KF2C-K
FD800R33KF2C
FD800R33KF2C-K
Skiip342GDl120-4Du
Skiip1013GB172-2DL
Skiip1203GB172-2Dw
Skiip1513GB172-3DL
Skiip1803GB172-3Dw
Skiip2403GB172-4Dw
Skiip2013GB172-4DL
Skiip513GD172-3DUL
Skiip592GB170-2D
Skiip792GB170-3D
Skiip1092GB170-4D
Skiip592GH170-4D
Skiip292GD170-3Du
Skiip11NAB065V1
Skiip12NAB065V1
Skiip13NAB065V1
Skiip14NAB065V1
Skiip25NAB065V1
Skiip26NAB065V1
Skiip37NAB065V1
Skiip38NAB065V1
Skiip11NAB066V1
Skiip13NAB066V1
Skiip14NAB066V1
Skiip25NAB066V1
Skiip26NAB066V1
Skiip38NAB066V1
Skiip01NAC066V1
Skiip02NAC066V1
Skiip03NAC066V1
Skiip01NEB066V1
Skiip02NEB066V1
Skiip03NEB066V1
Skiip11NAB126v1
Skiip12NAB126v1
Skiip23NAB126v1
Skiip24NAB126v1
Skiip35NAB126v1
Skiip36NAB126v1
sk8bgd065e
sk10bgd065et
sk15bgd065et
sk20bgd065et
sk20dgd065et
sk25dgd065et
sk10dgdl065et
sk15dgdl065et
sk20dgdl065et
sk10dgdl126et
sk15dgdl126et