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Agency for Defence Development, Daejeon 305-152, Korea(Received February 10, 2014; Accepted February 19, 2014)Abstract: This paper examines the destruction behavior of NPN BJT (bipolar junction transistor) by repetition pulse. The injected pulse has a rise time of 1 ns and the maximum peak voltage of 2 kV. Pulse was injected into the base of transistor. Transistor was destroyed, current flows even when the base power is turned off. Cause the destruction of the transistor is damaged by heat. Breakdown voltage of the transistor is 975 V at single pulse, and repetition pulse is 525∼575 V. Pulse repetition rate increases, the DT (destruction threshold) is reduced. Pulse Repetition rate is high, level of transistor destruction is more serious.Keywords: Pulse injection, Repetition pulse, Transistor, NPN BJT

A Study on Destruction Characteristics of BJT (Bipolar Junction Transistor) at Different Pulse Repetition Rate