High-reliability thyristor device

The utility model discloses a high-reliability thyristor device, which comprises a shell and a pin, the pin connected with an internal circuit of the shell is positioned at one end of the shell, a heat dissipation cover is arranged at the top of the shell, a first positioning hole is arranged at one end of the heat dissipation cover, a second positioning hole corresponding to the first positioning hole is arranged on the shell, and the second positioning hole is positioned at the other end of the shell. A positioning screw can penetrate through the first positioning hole to be in threaded connection with the second positioning hole, a limiting clamping block is fixedly installed at the other end of the heat dissipation cover and located on the lower surface of the heat dissipation cover, and a first groove for the limiting clamping block to be embedded in is formed in the surface of the side, opposite to the heat dissipation cover, of the shell. According to the high-reliability thyristor device, reliable and