|Name||TO-92 (Transistor Outline 92)|
|Pitch||Variable, commonly adjusted to 2.54mm.|
|Solderability||Perfect for hand soldering and prototyping! Fits well into breadboards.|
|Height||10mm (typical, including body and enough space to get the through-hole legs mounted in the PCB).|
TO-92 is a very common package for low-power through-hole transistors, MOSFET’s, and linear regulators.
If a package is just labelled as TO-92, then it is most likely to be the “standard” variant, which is also known as TO-226AA.
The TO-92/18 variant of the TO-92 package is similar to the standard package (which is just called the TO-92), except that it has a longer body. It is also known as the TO-226AB or TO-92MOD package.
Pin numbering is always done from left-to-right, when the flat side of the TO-92 package is facing you and the legs are pointing downwards, as shown in the following diagram:
This is applicable to both the standard TO-92 (TO-226AA) and TO-92/18 (TO-226AB) variants.
The pinout for JEDEC-named 2N series transistors is standardised as per the following table:
|Pin Number||BJT Connection|
Thermal Resistance And Heatsinks
There are a limited range of heatsinks available for the TO-92 component package. Aavid Thermalloy makes two TO-92 heatsinks, one of which is currently available (as of May 2016) on DigiKey.