IRFPs

[barossi]

Hello,
regarding IRFP140 and IRFP9140, which manufacturer produces the best transistors?

Regards Barossi

 

[rhthatcher]

I had to do a google search - but this post is one of many with a similar message.

G

Thread 'Fairchild/Harris/Intersil 9240 genealogy'

2004-02-21 12:10 am

I am currently experimenting with and modifying the Aleph 0s circuit and am about to start prototyping. I am using IRFP240 and IRFP9240 output devices. I have purchased a number of Fairchild SFH9240 devices because they available and relatively cheap. They also look good judging from the Fairchild data sheet. I have two questions to ask the forum:

1) Has anyone tried the SFH9240 yet? How do they compare to IR parts or more importantly the old Harris/Intersil parts?

2) Where did the SFH9240 come from? The Harris MOSFET operation became Intersil in 1999. Fairchild then bought Intersil in...

• gl
• Replies: 7
• Forum: Pass Labs

 

[Dennis Hui]

Papa commented on the 140 and 9140 here: https://www.diyaudio.com/community/threads/f5m-kit.408290/page-73#post-7680395

 

[Zen Mod]

ZM likes IR P mosfets bloom

 

[Nelson Pass]

My favorites, for no good reason, are the Harris parts. However, there are no issues with any version of 140 and 9140 I have seen.

Over time I have learned work arounds for the IR version of the 9240's, so even that remains a practical option.

😎

 

[Loudthud]

But, do IRFP9140s suffer from the same problem and IRFP9240s ?

 

[Nelson Pass]

No.

 

[stocktrader200]

I am using IRFP240 and IRFP9140. They sound fantastic. Not sure what if any distortion difference there may be.

 

[Mikerodrig27]

The F5m thread may offer some insight into some good choices for 9140 parts.