View 30tps datasheet:

Bulletin I2136 04/97 SAFEIR Series 30TPS.. PHASE CONTROL SCR VT < 1.3V @ 20A ITSM = 300A VRRM 800 to 1600V Description/Features The 30TPS.. SAFEIR series of silicon controlled rectifiers are specifically designed for medium power switching and phase control applications. The glass passivation technology used has reli- able operation up to 125°C junction temperature. Typical applications are in input rectification (soft start) and these products are designed to be used with International Rectifier input diodes, switches and output rectifiers which are available in identi- cal package outlines. Major Ratings and Characteristics Package Outline Characteristics 30TPS.. Units IT(AV) Sinusoidal 20 A waveform IRMS 30 A VRRM/ VDRM up to 1600 V ITSM 300 A VT @ 20 A, TJ = 25