TO-206 Component Package

Overview

The TO-206 (Transistor Outline Package, Case Style 206) component package is a family of large through-hole metal can packages used for things such as transistors. There are variants with anywhere from 2 to 8 leads¹.

Synonyms:

• H03C: What National Semiconductor calls the TO-206AA².
• TO-18

Variants:

• TO-206AA: The popular 3-lead variant. Also called TO-18-3.
• TO-206AB: 3-lead with 1.90mm cap height. Also called TO-46.¹
• TO-206AC: 3-lead with 3.30mm cap height. Also called TO-52.¹
• TO-206AF: 4-lead. Also called TO-72.
• TO-71: 8-lead TO-18.

Common Uses

• Diodes (TO-18-2)
• Transistors (TO-18-3)

Similar To:

• TO-39
• TO-92

TO-206AA (TO-18-3)

The TO-206AA is the most common 3-lead version in the TO-206 family. It is also known by it’s older name as the TO-18-3 – or just ambiguously as the TO-18. National Semiconductor called this package H03C². Transistors such as the 2N2222A BJT are available in this package.

The dimensions of the TO-206AA are shown below:

References