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0 votes
1 answer
54 views

What does the interface between lead(s) and the silicon chip look like inside a semiconductor package?

For a leaded semiconductor, like a diode or a transistor, one of the leads is usually the same piece of metal as the copper pad/heat spreader on the back, which is also shorted to one of the junctions ...
FlakR's user avatar
  • 749
5 votes
1 answer
2k views

What is the difference between TO-3 and TO-204AA packaging?

I am trying to build a circuit for a power amplifier and TO-204AA is the packaging used in the circuit diagram. KiCad does not have TO-204AA but it has TO-3. Looking at the image below you will see ...
Shridhar Sharma's user avatar
1 vote
1 answer
239 views

SMD transistor die vs DIP transistor die [closed]

Is the die of SMD transistors different from die of DIP transistors with a unique part number? Is the power transmission of a transistor dependent on its package type or chip type ?
mojtaba's user avatar
  • 63
21 votes
3 answers
35k views

What is the difference between SOT 23 and SOT 23-3 package types?

I am faced with two types of packaging: SOT 23 SOT 23-3 Is there some difference between them? Based an article in Wikipedia it seems like there are no differences.
KMM's user avatar
  • 419
0 votes
1 answer
166 views

Reference of component

I´m trying to repair my lock control in my car. And this board seems like the problem, so I want create a new board (exactly the same) based on this. But I facing a challenge: I cant determine what ...
Orlando's user avatar
  • 101
3 votes
1 answer
246 views

How are metal leads on through hole parts made?

For example, consider a TO-92 packaged part: How is one of its leads manufactured? Can they be customized?
Conor Patrick's user avatar
1 vote
1 answer
2k views

BEC or CEB NPN Transistor [closed]

I am looking for a small, inexpensive NPN transistor, similar to 2N4401 in specs, with a BEC or CEB pinout. Does anyone know of any?
mcu's user avatar
  • 531
0 votes
1 answer
167 views

TO-18 case connected to device?

I'm seeing some weird behavior in a circuit I just soldered up. I haven't done detailed debugging yet, but it occurred to me that the metal case on the 2N2222A transistors I used might be connected ...
arcticmac's user avatar
  • 133
4 votes
1 answer
961 views

Are the non-metallic colored heat sinks of transistor packages electrically isolated/nonconductive?

When I look at transistor packages, I see two different heat sink types. One type is in metallic color, the other type is black plastic colored. I read datasheets of some components, none of them ...
hkBattousai's user avatar
  • 14.2k