• Active speaker SOT-23 component identification

It is currently 6 January 2025, 00:43

 [SOLVED] Active speaker SOT-23 component identification

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#1 Active speaker SOT-23 component identification

by matic • 28 February 2024, 20:47
Hello!

Please, identify the SOT-23 component in the following picture.
Image

Pin 3 is connected to the ground.
Image

It's located on the active speaker pre-amplifier board.
Brand and model: Bang & Olufsen BeoLab 4000 mk2
Image

Re: Active speaker SOT-23 component identification

by Google Adsense [BOT] • 28 February 2024, 20:47

#2 Re: Active speaker SOT-23 component identification  [SOLVED] 

by Vogelek23 • 28 February 2024, 22:24
There is a series resistor of low value (330Ω) to pin 2 and pin 3 is connected to ground, so it looks like a bipolar NPN transistor. Therefore, I am almost sure that PBHV8115T is the right answer. Please find attached datasheet.



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#3 Re: Active speaker SOT-23 component identification

by matic • 29 February 2024, 08:41
I found this too, but it seems strange that a high-voltage transistor rated 150V is used on the board with the power supply ±12V.
Also, the marking on the transistor PBHV8115T should probably be "W6-", "W6p", "W6t", or "W6W", unless there is another factory in different country.
Image

#4 Re: Active speaker SOT-23 component identification

by matic • 20 March 2024, 18:43
Transistor replaced with BC817-25 and everything works.
I'm replying late, because I was waiting for some other components.

Thanks Vogelek23!

Re: Active speaker SOT-23 component identification

by Google Adsense [BOT] • 20 March 2024, 18:43
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