Trying to replace rectifier in my amp/dac. I came across the Germanium (SiGe) rectifier PMEG120G. Just wondering if anyone try it and compare it to say the schottky or the SIC schottky type.
Thanks.
Thanks.
That's not germanium, its silicon germanium, an alloy. SiGe can have many different compositions, and a lot of "SiGe" devices use heterostructures so its a complex subject. The diode specs suggest fast reverse recovery characteristics. Its only rated at 120V though which is low for a general purpose rectifier.
Right. Anyways, its a news class of rectifiers. 120v is plenty for use for amp/preamp/dac, except tube power supplies.
Just curious if anyone has experience with those.
here is the link to the datasheet
https://assets.nexperia.com/documents/data-sheet/PMEG120G30ELP.pdf
Just curious if anyone has experience with those.
here is the link to the datasheet
https://assets.nexperia.com/documents/data-sheet/PMEG120G30ELP.pdf
Many SS power amps require more reverse voltage than that! Even +/-50V supply is probably too borderline to risk it (unloaded voltages can be significantly higher than rated voltage).
And then there are mains transients to consider. I'd suggest 200V or 400V PIV is a good spec to go for for general SS power amp use, especially as cheap bolt-on full-bridge rectifiers are available in those ratings and will be for the foreseeable future too. Fast recovery are only really useful for switch-mode supplies which I think is what these SiGe diodes are designed for.