Driverboard question

[caraudioguy2100]

I’m rebuilding a Audio driverboard for an amp it’s the driverboard woth 2 ic’s ir21844s

I ordered mmbt3906/3904 transistors the package says mmbt3904-7-f but according to the markings on the smd transistors they are mmdta42 and mmdta92

Will these transistors work or do I need to order new ones again

 

[Perry Babin]

Which transistor are you needing to replace? The 390... are low voltage. The 42/92 are high voltage.

 

[caraudioguy2100]

I need to replace Q3 and Q1 on the driverboard

The transistors I received are marked

K1N which is mmbt3904

K3N which is a mmdta42

 

[Perry Babin]

What is the brand of the transistor you received?

It's very rare for these to fail. Are you sure they failed?

 

[caraudioguy2100]

They were missing when I received the amp

Here is the pic of the ones I ordered and what I received.


Also the transistors marked max on them are missing
Would the 2sc3326 be good replacements

 

[Perry Babin]

Supposedly. I've never had to use them.

K3N:
https://www.mouser.mx/ProductDetail...=sGAEpiMZZMshyDBzk1/Wi6ThrNvs3BALhhZVp4dTcTc=