TO-5

Transistor in a TO-5 package with 25 mm leads.
Gear-shaped heat sinks for TO-5 packages.

In electronics, TO-5 is a designation for a standardized metal semiconductor package used for transistors and some integrated circuits. The TO element stands for "transistor outline" and refers to a series of technical drawings produced by JEDEC.[1] The first commercial silicon transistors, the 2N696 and 2N697 from Fairchild Semiconductor, came in a TO-5 package.[2]

  1. ^ Cite error: The named reference TO-5_Spec was invoked but never defined (see the help page).
  2. ^ "Fairchild 2N697". Transistor Museum. Retrieved 2021-07-16.