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Old 6th June 2012, 04:22 PM   #1
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Default Which transistor is good one

Which transistor is good one??

Left Middle Right
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Old 7th June 2012, 01:42 AM   #2
JMDUC is offline JMDUC  Canada
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Kind of hard to test them from the internet. What do you mean by good.
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Old 7th June 2012, 02:34 AM   #3
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Without X-ray vision, I'll guess the OP has 3 different brands of 2N5401 and wants to know if theyre genuine.

OK, have at it!

Last edited by Ian Finch; 7th June 2012 at 02:36 AM.
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Old 7th June 2012, 02:38 AM   #4
AKSA is offline AKSA  Australia
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Location: Melbourne, Australia
OK, educated guess:

Left is Korea
Center is Japanese
Right is possibly a cheap knockoff

Aspen Amplifiers P/L (Australia)
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Old 7th June 2012, 02:58 AM   #5
Jay is offline Jay  Indonesia
Join Date: Feb 2003
Location: Jakarta
In the middle is the best one. The "Y" I think represents a higher class of hfe, and they do have high hfe, just measure it with DMM. Whatever the brand, if it measures better then I think it should be a better transistor.
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Old 7th June 2012, 12:48 PM   #6
jaycee is offline jaycee  United Kingdom
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Location: Norwich, UK
left one by KEC, middle one unknown but looks good quality, right one by CDIL
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