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'[EE] QUERY: How to find equivalents for transistor'
2006\03\16@123755 by Mike Hord

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Let's get this into the archive!

BJT transistor substitue table
from
http://www.kpsec.freeuk.com/components/tran.htm

NPN
BC107          NPN          TO18          100mA          45V          110          300mW          Audio, low power          BC182 BC547
BC108        NPN        TO18        100mA        20V        110        300mW        General purpose, low power
       BC108C BC183 BC548
BC108C        NPN        TO18        100mA        20V        420        600mW        General purpose, low power        
BC109        NPN        TO18        200mA        20V        200        300mW        Audio (low noise), low power
       BC184 BC549
BC182        NPN        TO92C        100mA        50V        100        350mW        General purpose, low power
       BC107 BC182L
BC182L        NPN        TO92A        100mA        50V        100        350mW        General purpose, low power
       BC107 BC182
BC547B        NPN        TO92C        100mA        45V        200        500mW        Audio, low power        BC107B
BC548B        NPN        TO92C        100mA        30V        220        500mW        General purpose, low power        BC108B
BC549B        NPN        TO92C        100mA        30V        240        625mW        Audio (low noise), low power        BC109
2N3053        NPN        TO39        700mA        40V        50        500mW        General purpose, low power        BFY51
BFY51        NPN        TO39        1A        30V        40        800mW        General purpose, medium power        BC639
BC639        NPN        TO92A        1A        80V        40        800mW        General purpose, medium power        BFY51
TIP29A        NPN        TO220        1A        60V        40        30W        General purpose, high power        
TIP31A        NPN        TO220        3A        60V        10        40W        General purpose, high power        TIP31C TIP41A
TIP31C        NPN        TO220        3A        100V        10        40W        General purpose, high power
       TIP31A TIP41A
TIP41A        NPN        TO220        6A        60V        15        65W        General purpose, high power        
2N3055        NPN        TO3        15A        60V        20        117W        General purpose, high power
PNP
BC177          PNP          TO18          100mA          45V          125          300mW          Audio, low power          BC477
BC178        PNP        TO18        200mA        25V        120        600mW        General purpose, low power        BC478
BC179        PNP        TO18        200mA        20V        180        600mW        Audio (low noise), low power        
BC477        PNP        TO18        150mA        80V        125        360mW        Audio, low power        BC177
BC478        PNP        TO18        150mA        40V        125        360mW        General purpose, low power        BC178
TIP32A        PNP        TO220        3A        60V        25        40W        General purpose, high power        TIP32C
TIP32C        PNP        TO220        3A        100V        10        40W        General purpose, high power        TIP32A

Mike H.

2006\03\16@124525 by William Couture

face picon face
On 3/16/06, Bill Kuncicky <spam_OUTkuncickyTakeThisOuTspamgmail.com> wrote:
> I am building a circuit which calls for a BC-177 transistor.  Digikey
> doesn't seem to have a listing for it, so I need to get an equivalent.
> As it is a low-power, audio transistor I feel sure that it will not be
> hard to find an equivalent, but I was wondering if there might be an
> easier way than just manually matching characteristics until I find
> something.  Is there some sort of "equivalence table" (or whatever the
> right name might be) available on the internet?  ("Teach a man to fish .
> . . :-)

I did a little googling, and found some helpful links:
  www.kpsec.freeuk.com/components/tran.htm
(explanations of transistor numbering and a few recommended substitutions)
  www.ee.washington.edu/circuit_archive/parts/cross.html
(transistor cross-reference database.  Type in transistor part number and
get equivalents.  Though their search might be too narrow for hobbiest use).

Bill

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