Substitute for Diode BAV199

[Crazyboss]

Hello

Need some help from your electronic guys

Can I used two 1n4148 diods instead of one BV199 ?

[1024MAK]

In what circuit and in which position is this for?

Mark

[Bill B]

Looking at the data sheets, it seems to me that there are two significant differences between the BAV199 and a pair of 1N4148:

• The BAV199 diodes have a reverse leakage current of only 5nA, as opposed to 25nA for the 1N4148.
• The two diodes in a BAV199 will be very closely matched, and thermally coupled, so will have almost identical characteristics.

So if either of these characteristics are important in the circuit, then not a good idea to substitute.

If, however, the BAV199 is used just because it is a convenient small package for two diodes, then probably OK. The voltage and power ratings of the 1N4148 should be adequate.

[Crazyboss]

Bill and Mark, I will bring the schematics for the Memofest, then you can help me to understand it
Its quite simple, circuit.