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Old 25th August 2011, 09:27 AM   #1
NMOS is offline NMOS  Germany
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Default Peplacement for 2N5638 JFET Chopper Transistor ...?

Hello,...

I need replacement with available components, 2n5638 is hard to get, not stock by German and EU distributors and Fairchild inform: not recommended for new designs

does somebody know replacement for 2N5638 JFET Chopper Transistor with available components in market ?
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Old 25th August 2011, 05:59 PM   #2
khalsa is offline khalsa  India
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i think bf245 and 2n4392
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Old 26th August 2011, 02:37 PM   #3
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You need Idss>50 mA and Ron<30 Ohm.
One equivalent is PN4391.
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Old 26th August 2011, 03:22 PM   #4
NMOS is offline NMOS  Germany
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Quote:
Originally Posted by StevenOH View Post
You need Idss>50 mA and Ron<30 Ohm.
One equivalent is PN4391.

it looks

PN4391
2n5638

devices going obsolet

onsemi and fairchild has for 2n5638 last shipment, not recommended for new designs

PN4391 from Vishay Siliconix obsolet

are any replacement devices available ?

impossibile to get by european distributor
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Old 26th August 2011, 05:14 PM   #5
Elvee is offline Elvee  Belgium
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According to Siliconix's documentation, the 2N5638 belongs to the process/geometry NC.

This NC chip can be found in the following devices:

TO18:
2N3970-72, 2N4091-93, 2N4391-93, 2N4856-61, FN4392-93, U200-01, VCR2N

TO92:
2N5638-40, 2N5653-54, J111-113, PN4091-93, PN4391-93, U1897-99

TO71 (dual):
2N5664-66, DN5664-66, DN5667
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Old 26th August 2011, 05:17 PM   #6
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Do you need parts for repair or for large scale production?
Quick check with Mouser shows 6000+3000+ in stock.
For the EU distributor you can type your part number in Google.
Well, you should be able to find J111, or
TIS73
PN4091
PN4856
PN4859
Farnell has the parts that will work.
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