Reverse leakage current
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When a semiconductor device is reverse biased it should not conduct any current at all, however, due to increased barrier potential, the free electrons on p side are dragged towards positive while holes on n side are dragged towards negative of the battery this current flows due to minority charge carriers and hence its magnitude is very very small. For constant temperature reverse current is almost constant though applied reverse voltage is increased up to certain limit. Hence it is also called as reverse saturation current.
The term is particularly applicable to is mostly semiconductor junctions, especially diode and thyristor.
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