[SOLVED] Diode performance specification

[Zak28]

Is a fast recovery diodes maximum reverse recovery time the same speed during its max forward current & Repetitive peak reverse voltage or is it much longer than what was specified?

 

[Easy peasy]

usually specified on the data sheet, e.g. 125 degC and If = 30A, and dIf/dt = 100A/us ( quite slow ) etc

you have to read all the fine print carefully...

 

[Zak28]

usually specified on the data sheet, e.g. 125 degC and If = 30A, and dIf/dt = 100A/us ( quite slow ) etc

you have to read all the fine print carefully...

Most small SMT diodes dont have any charts for recovery time or di/dt.

 

[barry]

Most small SMT diodes dont have any charts for recovery time or di/dt.

Which is telling you that if those are critical parameters for you, you shouldn’t be using that particular device. It’s like asking what the 0 to 60 acceleration for a Smart Car is. If you’re asking that question, it’s the wrong car. (FYI, it’s double digits).

 

[Easy peasy]

if you are using a small diode in a switching ckt and the data sheet does not give switching information, then you use it at your own risk, other batches may differ significantly from the unique one you try in a single prototype.

For a more guaranteed outcome you have to buy from a manufacturer who does list these parameters, e.g. ST.com