What is the limitation on forward bais?

The limitation on forward bias in semiconductor devices, such as diodes, is primarily related to the maximum current that can flow through the device without causing thermal breakdown or damage. Excessive forward bias can lead to increased carrier injection, resulting in overheating and potential failure. Additionally, the forward voltage drop becomes significant at higher currents, affecting efficiency and performance. Finally, in practical applications, there are also considerations like power dissipation and circuit design that impose constraints on the level of forward bias used.