TO220

TO220 is a type of through-hole package used for semiconductor devices, particularly transistors and diodes. It is one of the most common package types for power transistors and is widely used in various electronic applications due to its simplicity and reliability. The TO220 package is characterized by its cylindrical shape with two leads, hence the name "TO" for "Transistor Outline" and "220" indicating the package dimensions in hundredths of an inch.

The TO220 package typically has a body that is 0.220 inches (5.59 mm) in diameter and 0.350 inches (8.89 mm) in height. It features two leads that are bent at a 90-degree angle from the body, providing a stable and secure mounting on a printed circuit board (PCB). The leads are usually spaced 0.100 inches (2.54 mm) apart, which is a standard pitch for through-hole components.

The TO220 package is suitable for power transistors that require good heat dissipation. The cylindrical body provides a larger surface area for heat to dissipate, making it ideal for applications where heat management is crucial. This package type is commonly used in power supplies, motor drivers, and other high-power electronic circuits.

In summary, the TO220 package is a reliable and widely used through-hole package for power transistors and diodes. Its cylindrical shape and two leads make it easy to mount on a PCB, while its larger surface area facilitates effective heat dissipation.