The newest selection technique of semiconductor discharge tube
Semiconductor discharge tubes are referred to as TSS for short. TSS is a new protection device according to the injection production technology of silicon controlled principle by ion conduction, with accurate fast response (NS response time), absorptive capacity, strong surge characteristics of higher reliability, bidirectional symmetry. Because its surge current capacity is stronger than that of TVS tubes of the same size, it can be used instead of TVS tubes in passive circuits. But its turn-on characteristic is close to short circuit and can not be directly used in active circuit. In this circuit, the current limiting component must be added so that the current is less than the minimum maintenance current. The semiconductor overvoltage protector consists of three kinds of packaging, namely, mount type, inline type and axial lead type. 1. The Vdm of the semiconductor discharge tube shall be higher than the maximum DC or continuous operating voltage of the protected circuit, the rated voltage of the circuit and the high-end tolerance. Serial link split voltage, parallel link split current.
2. The transition voltage Vbo must be less than the maximum instantaneous peak voltage allowed by the protected circuit.
3. The Ipp of the semiconductor discharge tube shall be greater than the transient surge current of the circuit.
4, according to PCB layout or prefer semiconductor discharge tube packaging structure.