how the two wires with stud types thyristors connected ?

a white  one pick out from the ceramic (namely control pole or the gate pole, the anode), and another one connect to the metal  part of thyristor (cathode cathode)

Previous:what's difference about the quality for chip?

Next:what specification are the thread for stud type standard recovery diode such as 40HF(R) 70HF(R) 85HF