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Old 27th June 2008, 01:07 AM   #1
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Default aleph-3 transistor replace


i want to understand about aleph-3 using the transistor MPSA18... which will be best replacement of this transistor?

MPSA18= (Replacement) 2N5551 or BC550c

thank you
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Old 27th June 2008, 02:37 AM   #2
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Join Date: Mar 2001
Generic transistors work fine. The MPSA18 is a high gain device,
but anything over 100 will work.
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Old 27th June 2008, 11:05 AM   #3
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which one have high HFE......

2n5551 or BC550

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Old 2nd July 2008, 07:26 AM   #4
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Alain Dupont's Avatar
Join Date: Sep 2003
Location: Paris - France

BC550 hfe 270 > 520
2N5551 hfe 50 > 200

In your case the BC 550 will be fine.

Did live about 10 years in Canada
Back to France since the 1st February 2007.
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