[Test-Equipment] Transistor part numbers

[John Kolb]

Furthermore, part numbers without the 2Nxxxx, etc are unregistered types.

In some cases, manufacturers offered devices similar to another manufacturers
2N numbers with a similar number, Motorola's MPS3646 (MPS=Motorola
PlasticSemiconductor) would be equivalent to the 2N3646. PN3646's were
sold by Fairchild, among others.



At 11:14 AM 1/2/2006, Glenn Little WB4UIV wrote:
>In the US standard (JEDEC) numbered 
>semiconductors are marked with a the number of 
>junctions followed by an 'N' (do not know why) 
>and then a sequential registration number. 
>Diodes (one junction) are marked 1Nxxx. Two 
>junction devices (SCR, bipolar transistors and 
>the like) are marked 2Nxxx. Three junction 
>devices (MOSFETS) are marked 3Nxxx. Four 
>junction devices (opticouplers) are marked 4Nxx.
>
>Japan uses a system where the N is replaced by 
>an S and usually another letter. The other 
>letter tells additional information about the device.
>
>Hope this helps a little
>
>Happy new year
>73
>Glenn
>WB4UIV
>
>At 02:03 PM 01/02/06, Rasputin Novgorod wrote:
>
>>I notice that transistor part numbers frequently start
>>with 2N, eg: 2N3055. So, why don't PNP transistors start
>>with 2P?
>>
>>Sincerely
>>/b
>>
>>
>>
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