Oldsansui441
Super Member
KSA992 FBTA are the same gain as the FBU just come in cut tape not bulk.
KSA1220AYS is fine and is the highest gain version for this part.
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You may have to get the KSC1845's form Digikey or Element 14.
The datasheets for each will tell you their gain values etc.
I usually always use these fairchild transistors but when l have ran out etc l have substituted for BC's etc but the KSA992's and KSC1845's have better gains and have better leg orientation, usually you just have to reverse them to the originals.
KSA1220AYS is fine and is the highest gain version for this part.
.
You may have to get the KSC1845's form Digikey or Element 14.
The datasheets for each will tell you their gain values etc.
I usually always use these fairchild transistors but when l have ran out etc l have substituted for BC's etc but the KSA992's and KSC1845's have better gains and have better leg orientation, usually you just have to reverse them to the originals.