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A Look Inside a Power Transistor

A Look Inside a Power Transistor

I was so surprised by what is inside a common power transistor that I wanted to show you too.


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Tags: transistors

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  1. Date: March 3, 2014 at 19:57
    Author: TheScottytr6

    Wow. I would have thought the silicon chunk would be much bigger for a power transistor. It looks about the same size as the one in your CPU that has 8 million transistors on it. Very cool to see. Thanks.

  2. Date: March 3, 2014 at 20:56

    Hi Jim. Not sure if this is true has I've never tried it,but I've heard that on a working power transistor that,they will make a small voltage when in sun lite or a bright lamp. Thank you for showing this.

  3. Date: March 11, 2014 at 02:05
    Author: vibra64

    Is the collector the case of the transistor?

  4. Date: June 4, 2015 at 16:49
    Author: MrMac5150

    amazing, must be two dissimilar metals bonded, to generate the heat from this
    power transistor, I wonder if the sealed envelope, is filled with some  type of gas.

  5. Date: November 21, 2015 at 00:54
    Author: Mentorcase

    I just had 1 fail in my power supply and just wondered what was actually inside 1 of these and I am surprised to see that, I had imagined 2 large wafers separated by the doping compound.

  6. Date: July 28, 2016 at 13:16
    Author: a

    Stop chewing your nails 😉

  7. Date: October 27, 2017 at 18:14

    That glue you mention serves as both mechanical bonding and thermal transfer compound. It appears that the primary cause of failure was the offset between the application of the paste and that of the chip. You can see that the corner underneath the lead from which the solder melted doesn't have enough under it.

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