Russia type, stud version thyristor 40A~50A, 200V~1600V. TO-65 case, also have fast thyristor, triac.

Features
High surge current capability
Stud cathode and stud anode version
Wide current range
Inch device version available

Typical Applications
Machine tool controls
Battey charges
Converters
Motor controls
Welder
Phase control applications in converters
Lighting circuits

Type    IT(AV)      VTM/ITM   IT(RMS)   VRRM    IRRM    IGT      VGT  

           THS55'C      25'C  

             A              V   A         A             V        mA        mA     V   

40RIA  40         1.95  120      64      200-1200    ≤12   50-200  ≤2.5

50RIA  50        1.90  150      80      200-1200    ≤12   50-200  ≤2.5

Type           IH        IL       dv/dt      di/dt     Rjc       TJ        Mounting power   Outline

                 mA      mA      v/us      A/us    C'/W                     N/m

40RIA     ≤150  ≤200  ≥500  ≥100   ≤1.0   -40~+125'C   ≤2.5      TO-65       

50RIA     ≤150  ≤200  ≥500  ≥100   ≤0.8   -40~+125'C   ≤2.5       TO-65