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Low rDS(on) JFETs?
Low rDS(on) JFETs?
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Old 14th January 2019, 10:24 AM   #1
Merlinb is offline Merlinb  United Kingdom
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Default Low rDS(on) JFETs?

Does anyone know of any really low rDS(on) JFETs now the J109 is going obsolete? SMD is fine. (The J109 was rated for 12 ohms max)
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Old 14th January 2019, 10:35 AM   #2
Mark Johnson is offline Mark Johnson  United States
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Low rDS(on) JFETs?
The Fairchild / ON Semiconductor J105 is still in active production. Its datasheet value of rDS(on) is 3 ohms.

Two years ago I measured the IDSS of a J105, and found it was 1.1 amperes (!). I had to use pulse techniques to prevent the JFET from overheating. (link)
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Old 14th January 2019, 11:26 AM   #3
Merlinb is offline Merlinb  United Kingdom
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Thanks for the tip!
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Old 14th January 2019, 02:26 PM   #4
gerhard is offline gerhard  Germany
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Interfet IF3601 / IF3602 (Mouser)
Shocking price tag.

Texas Instruments P8000 / P8002 in TO-220. Long time gone.

regards, Gerhard
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Last edited by gerhard; 14th January 2019 at 02:29 PM.
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