This part is a kind of semiconductor called 30TPS08.

Function of this product has PHASE CONTROL SCR.

Manufacturers : International Rectifier

Image and pinout :

Some of the text within the PDF file :

Bulletin I2136 04/97 SAFEIR Series 30TPS.. PHASE CONTROL SCR VT ITSM < 1.3V @ 20A = 300A VRRM 800 to 1600V Description/Features The 30TPS.. SAFE IR series of silicon controlled rectifiers are specifically designed for medium power switching and phase control applications. The glass passivation technology used has reliable 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 identical package outlines. Major Ratings and Characteristics Characteristics I T(AV) Sinusoidal waveform I RMS VRRM/ VDRM I TSM VT dv/dt di/dt TJ @ 20 A, TJ = 25°C 30 up to 1600 300 1.3 500 150 - 40 to 125 A V A V V/µs A/µs [ ... ]

30TPS08 PDF Datasheet Download