What is breakdown voltage and saturation current?

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(N/A) $1$. Breakdown Voltage: It is the minimum reverse bias voltage applied to a $P-N$ junction diode at which the junction breaks down and a large current flows through it. This occurs due to Zener effect or Avalanche effect.
$2$. Saturation Current: In a $P-N$ junction diode under reverse bias,the current is due to minority charge carriers. This current is very small and remains almost constant regardless of the increase in reverse bias voltage. This constant current is known as the reverse saturation current $(I_0)$.

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