Audison SR1DK output fet replacement IRFP4232

[Maxikill97]

The Audison SR1DK had 4 IRFP4232 mosfets installed in the output section.
Here in DIYaudio was another post with a defect Audison SR1DK which had 4x IRFP264n installed on the output.

The IRFP4232 are very good fets (300v and 117A, RDS 30milli-ohm), but unfortunately hard to get for me.
The IRFP264N are 250v and 44A.

I have found the IRFP4332 (250V and 57A RDS 29milli-ohm).
They are more easy to drive since the input capacitance is lower then the IRFP4232.

Does anybody know if the IRFP4332 is a good alternative for an Audison SR1DK?

 

[Perry Babin]

The 117A isn't a good spec. It's for a 0.25% duty cycle pulse.

Use the continuous current at 25C and 100C, as well as the RDSon, CISS and QG.

 

[Maxikill97]

I see, ID is 60a on the IRFP4232.
Looks like the IRFP4332 is very close to the IRFP4232 then.

IRFP4332:
- 250V
- 57A
- RDS 29mohm
- Gate charge 99-150c
- Ciss 5860 pf


IRFP4232: (those were installed)
- 250v
- 60A
- RDS 30mohm
- Gate charge 160-240c
- Ciss 7290 pf

Looks like a good alternative right?
It's easier to drive them as well.

 

[Perry Babin]

It appears so but I've found it difficult to determine what's suitable in the class D output stage from specs. Test thoroughly and don't get too confident until the replacement has worked in multiple amps of the same model.

 

[Lenin89]

irfp264ns are obsolete.

Use the original ones, they are good enough.