# What is the relation between reverse saturation current and leakage current in a BJT?

#### detective_anubhav

Oct 8, 2021
2
I have been studying Studying Donald Neamen's Electronic Circuits 4th edition and Sedra Smith's Microelectronics 7th edition for quite some time now. I have been self studying. After searching extensively on Internet as well as trying to understand from the books, I have not been able to differentiate between two quantities in the context of BJT.

These two quantities are:

and

According to Sedra Smith,
is the collector base reverse current. Whereas
is the saturation or scale current given by

I have been wondering are these two quantities same or share some relation between them because I find the name for both these quantities being used inter-changeably at many places which is quite confusing and I believe they are not the same.

Also, I am confused which current is being referred to when on Internet I find the term "reverse saturation current". Searching on Internet the term "reverse saturation current" gives two kinds of sources: one referring it as
and the other referring it as
. Another similar quantity is
.

Last edited:

Oct 8, 2021
2