Safe operating range

In a transistor, this refers to the range in which input and output voltages and currents can be applied with a specified level of reliability over its lifetime without causing equipment failure or degradation. Usually, this corresponds to the specified rated input and output range. The transistor has a safe operating area for both forward and reverse bias states. When using a transistor in circuits with high power amplifiers or inductive loads, it is important to note that degradation or damage may occur even within the rated safe operating area.