Hello, great site.
I need to replace a diode that is not available anymore. I have its data sheet and have found close substitutes but nothing exact.
The specs of the original are:
Vrm - 400V
Vf - 1.3V
If - 1A
Ifsm - 25A
Ir - 10ua
trr - 50ns
My problem is the reverse current.
All the close matches I have found are 5ua. From what I have read, the "ideal diode" would have a reverse current of zero, the lower the reverse current the better.
This makes sense, If I am applying 350VAC at .5A continually, the voltage and current do not change when in reverse bias to the diode. Meaning the reverse current is a "Rating" of how much current the diode will let flow through it, not a "limit" of how much reverse current it can handle. So, I should be able to replace it with a diode with a lower reverse current rating.
My Question:
Is my logic in the above statement correct?
If not, why? Please provide details or point me relevant references.
Thank You
I need to replace a diode that is not available anymore. I have its data sheet and have found close substitutes but nothing exact.
The specs of the original are:
Vrm - 400V
Vf - 1.3V
If - 1A
Ifsm - 25A
Ir - 10ua
trr - 50ns
My problem is the reverse current.
All the close matches I have found are 5ua. From what I have read, the "ideal diode" would have a reverse current of zero, the lower the reverse current the better.
This makes sense, If I am applying 350VAC at .5A continually, the voltage and current do not change when in reverse bias to the diode. Meaning the reverse current is a "Rating" of how much current the diode will let flow through it, not a "limit" of how much reverse current it can handle. So, I should be able to replace it with a diode with a lower reverse current rating.
My Question:
Is my logic in the above statement correct?
If not, why? Please provide details or point me relevant references.
Thank You