Established in 1990 ,STT Co.,LTD is a manufacturer/shareholder company,which invests in many domains and factories.The main products include 0.6A - 6000A thyristors (SCR), diodes (disc, stud and plastic package type), triacs, modules and parts (ceramic housings, glass-metal Sealed Package,moly discs, caps and headers), kinds of transistors,dies (fusions), capacitors, electronic ballasts and so on.