avalanche breakdown in field effect rectifiers?

[incf]

Field effect rectifiers are new to me.

Does anyone know how susceptible they are to failure via avalanche breakdown?

I think I have to assume the worst "if it doesn't claim to survive it in the datasheet - it probably wont survive." I know some FETs are very sensitive to it.

[Kurets]

Unless I am mistaken it looks like the field effect rectifier is more or less the ST name for what Nexperia calls trench rectifiers, or Diodes Inc call super barrier rectifiers. These are somewhat similar to a depletion mode FET with source and gate tied together.

Reverse breakdown in any Schottky diode is a reliability concern. I would not make any circuit design which allows reverse breakdown to happen. Preferably de-rate reverse bias voltage to 70% of maximum to ensure that unexpected spikes or ringing does not cause failure of the device.

[incf]

100A to 200A inductive transients that occur when a fuse blows in the middle of a 24V power bus are what I'm up against.

Not sure what might happen with long enough cabling. Voltages from the inductive transients that occur when a fuse blows will probably greatly exceed ratings of the 40 or 60V rated diodes that are being used. It could easily exceed 600V for a few microseconds.

[Someone]

Does anyone know how susceptible they are to failure via avalanche breakdown?

Does the part have any specifications of the avalanche mode? The answer is right there.

[incf]

ST's field effect diodes don't have those ratings. (single event avalanche, or repetitive)

Heck, it seems the vast majority of shottkey diodes don't have them either. A select few have repetitive avalanche ratings, I have yet to come across one with a single event avalanche rating.

I'd like to ditch the ST field effect diodes in favor of paralleling some cheap S34 or S36 commodity shottkey diodes. But, I worry about these inductive transients and the lack of published ratings.

[moffy]

100A to 200A inductive transients that occur when a fuse blows in the middle of a 24V power bus are what I'm up against.

Not sure what might happen with long enough cabling. Voltages from the inductive transients that occur when a fuse blows will probably greatly exceed ratings of the 40 or 60V rated diodes that are being used. It could easily exceed 600V for a few microseconds.

You need to give the energy somewhere safe to go that suppresses the excessive spike.