I set up a circuit that uses a TIP31 transistor. However this transistor heats up and burns constantly, requiring its exchange. I was told to put the TIP31, B or even the C which support higher voltages and so do not burn with the same ease.
If the problem of the transistor burning is high voltage, with the component working at the limit, switching by types, B or C that support higher voltages can solve the problem. But warming indicates that the problem is current. Thus, you should first check if the heatsink used is sufficient for the power of the circuit and if the transistor is mounted correctly on it. You should also check that there is no additional problem in the circuit like some changed or out-of-specification component. If it is a source, check that the transformer secondary is under excessive voltage ...
