to-220封装尺寸数据参数TO 220 Leadbend Options National Semiconductor offers several types of enhanced packages. One with high popularity is the TO-220 package designed with exposed heat sink for efficient heat dissipation. Examples of some products used in this package are voltage regulators, comparators, and high current switches. The TO-220 package is offered in lead counts from 3 to 15. To provide flexibility on system board applications, several leadbend options are offered as shown. For any TO-220 package, please check with your sales representative for availability of requested leadbend options. Note: • Surface Mount Leadform available as TO-263 package.