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ERF9530 MOSFET VERSUS IRF9530 MOSFET.

L

long night

Active Member
Jan 8, 2020
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Hi to all. I understand that the IRF9530 MOSFET can be used to replace the ERF9530 MOSFET transistor. Is this true! The physical size of the IRF9530 is much smaller than the ERF9530. Does this make any difference with using the IRF TO REPLACE THE ERF power transistor in a amplifier?
Thanks for your advice and input here.
 
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The overlap of the two number's digit sequence is not useful here.

The ERF parts are purchased in bulk with the original manufacturer's number on it. That number get sanded off and the new "ERF" number printed on it. They sell until they run out.

But finding a part from International Rectifier, the "IR" in "IRF" that has the same four digits is like finding two phone numbers with the same last four digits. The area code and 3-digit exchange are different, but those last four digits are a match.

A coincidence, not a technical guide.

73
 
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nomadradio said:
The overlap of the two number's digit sequence is not useful here.

The ERF parts are purchased in bulk with the original manufacturer's number on it. That number get sanded off and the new "ERF" number printed on it. They sell until they run out.

But finding a part from International Rectifier, the "IR" in "IRF" that has the same four digits is like finding two phone numbers with the same last four digits. The area code and 3-digit exchange are different, but those last four digits are a match.

A coincidence, not a technical guide.

73[/QUO
Click to expand...
 
long night said:
[/QUOT
nomadradio said:
The overlap of the two number's digit sequence is not useful here.

The ERF parts are purchased in bulk with the original manufacturer's number on it. That number get sanded off and the new "ERF" number printed on it. They sell until they run out.

But finding a part from International Rectifier, the "IR" in "IRF" that has the same four digits is like finding two phone numbers with the same last four digits. The area code and 3-digit exchange are different, but those last four digits are a match.

A coincidence, not a technical guide.

73
Click to expand...
What if I test the IRF9530 mosfets and come up with a matched set. Can I then replace the ERF mosfets with the IRF mosfets? If so does that fact that the IRF mosfets are much smaller matter?
Thank you.
Click to expand...
 
nomadradio said:
The overlap of the two number's digit sequence is not useful here.

The ERF parts are purchased in bulk with the original manufacturer's number on it. That number get sanded off and the new "ERF" number printed on it. They sell until they run out.

But finding a part from International Rectifier, the "IR" in "IRF" that has the same four digits is like finding two phone numbers with the same last four digits. The area code and 3-digit exchange are different, but those last four digits are a match.

A coincidence, not a technical guide.

73
Click to expand...
So if I understand you the ERF mosfets could be any number but have 9530 stamped on them? The IRF mosfets are 9530 but will not replace the ERF mosfets because we don't know what number the ERFs really are? What if I replace all 8 of the ERF mosfets with a matched set of IRF mosfets with the same specs? Also does the smaller size of the IRFs matter?
 
long night said:
So if I understand you the ERF mosfets could be any number but have 9530 stamped on them? The IRF mosfets are 9530 but will not replace the ERF mosfets because we don't know what number the ERFs really are? What if I replace all 8 of the ERF mosfets with a matched set of IRF mosfets with the same specs? Also does the smaller size of the IRFs matter?
Click to expand...
 
Well, look at the Datasheet of the one that is known - being the IRF one...
upload_2021-12-15_7-6-51.png

Compare it to a KNOWN one that will work in systems like what you're intending to "convert"

There are reasons why the numbers are different - by manufacturer due to the versatility of the device and the intent of the maker to promote for that purpose.

To help you understand the differences between P-channel and N-Channel - just look for and utilize the "spike polarity protection diode" and note it's polarity.

Your device would blow the moment you turned on the power installed in a typical linear.

You might want to rethink that...
​
 
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Handy Andy said:
Well, look at the Datasheet of the one that is known - being the IRF one...
View attachment 49071
Compare it to a KNOWN one that will work in systems like what you're intending to "convert"

There are reasons why the numbers are different - by manufacturer due to the versatility of the device and the intent of the maker to promote for that purpose.

To help you understand the differences between P-channel and N-Channel - just look for and utilize the "spike polarity protection diode" and note it's polarity.

Your device would blow the moment you turned on the power installed in a typical linear.

You might want to rethink that...
​
Click to expand...
The intended application is a mosfet amplifier powered by 8 ERF9530 transistors at this time, but two are bad. I am unable to find replacement ERF mosfets so I thought I could use IRF moafets instead. Since that will not work, do you have some advice on the N channel mosfets that will work can be purchased?
Thanks for your help here.
 

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