Semiconductor discharge tube

“The thyristor semiconductor discharge tube” is a PNPN device—a gate‑less, voltage‑controlled silicon controlled rectifier. When the applied voltage exceeds its off‑state peak voltage (also known as the avalanche voltage), the semiconductor discharge clamps the transient voltage to within the device’s switching voltage (or turn‑on voltage). As the voltage continues to rise, the device enters conduction due to its negative resistance characteristic; it returns to its high‑impedance state only when the current falls below the holding current. Features: lightning protection, transient overvoltage protection, unlimited cycling, and rapid response (1 nanosecond). Typical applications: telephones, fax machines, communication interfaces, modems, data line protection, patch panel surge protectors, PBX subscriber circuits, SLIC circuits, ISDN, and more. Product…