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Russian Power Thyristor Disc T143 Series

Thyristors T143 are general-purpose pill-type thyristors designed to regulate and convert both DC and AC currents up to 1250A with a frequency of up to 500Hz in circuits with voltages ranging from 200V to 6600V. The polarity of the thyristor is determined by the symbol on its housing. Thyristors come in three housing types: PT41, PT42, PT43, where “PT” stands for “pill thyristor.” The T143 series includes various models: T143-320, T143-400, T143-500, T143-630, T143-800, T143-1000, and T143-1250.

During assembly, thyristors are connected to coolers using threaded connections. To minimize electrical losses and maximize heat dissipation, it is essential to provide the required tightening torque, known as the clamping force (Fm) – set at 15±1.5 kN. Compliance with the specified clamping force is determined by the deflection of the traverse.

For improved heat dissipation during assembly, heat-conductive paste KPT-8 can be used, although it is not a mandatory mounting condition. Thyristors can be manufactured for operation in various climates, including moderate, cold (HL), and tropical (T) environments.

ТБИ773
T143 Appearance
PRODUCT TABLE

LJT14312508 43 UHL2  

  • LJ-MD 
  • Т Low Frequency thyristor
  • 143 Series
  • 1250 A = IT(AV)
  • 8 *100V = URRM
  • 4 code for dUD/dt)cr
  • 3 code for tq
  • UHL2 for moderate and cold climates
PT42
PT41

For Symbols explanation CLICK HERE.

Part NumberUDRM/URRMIT(AV)ITRMSITSMTjmaxUTM/ITMUT(TO)rTIDRM/IRRM(dUD/dt)crIGTUGT(diT/dt)crtqi2tRth(j-c)Outline
VA(°C)AkA°CV/AVmAV/μsmAVA/μsµskA2s°C/W
LJ-Т143-3205000-6600346(85)/425(70)6674.51251.80/10051.301.70030200-20002502.52006301000.042PT43
LJ-Т143-4001800-2400490(85)/613(70)6309.01252.15/12561.200.95050200-16002502.52002504000.034PT42
LJ-Т143-500400-1600604(85)/750(70)1178111251.80/15701.100.57030200-16002502.52003206050.034PT42
LJ-Т143-630400-1600680(85)/937(70)850131251.65/19801.100.37030200-16002503.52001608450.030PT42
LJ-Т143-800900-1800847(85)/1050(70)1649141251.70/25130.850.30040200-16002502.52001609800.032PT42
LJ-Т143-1000200-10001010(85)/1240(70)1947211301.60/31400.850.25050200-16002502.520010022000.030PT42/PT41
LJ-Т143-1250400-8001518(85)/1750(70)2747211501.70/39270.790.17070200-16002502.520010022000.030PT41
NB:
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