Transistor Identification Numbers/Letters

[Docfletcher]

I have an amp that has transistors with the identification K1058 and then under that number the identifier 5A8. I'd like to know what the 2nd set of identifiers means on any given transistor? Thanks for your help.

 

[SoundOfSound]

K1058 ==> 2SK1058

https://www.mouser.com/datasheet/2/698/rej03g0906_2sk1056ds-1090468.pdf

http://www.datasheetcatalog.com/datasheets_pdf/2/S/K/1/2SK1058.shtml

 

[Guest125]

I have an amp that has transistors with the identification K1058 and then under that number the identifier 5A8. I'd like to know what the 2nd set of identifiers means on any given transistor? Thanks for your help.

The lower set of identifiers generally denote lot and rank if applicable.

 

[petehall347]

most likely got j162 as well .. lateral mosfet amp . does it have a problem ?

 

[Docfletcher]

Not sure, sound OK, but one transistor is a bit cooler than the others.