page_title: TO-18
hierarchical_section_title: TO-18
caption_attribution_description: English: Cross section of a 2N2222 in the TO-18 package. This part was made by ST Micro.
context_page_description: In electronics, TO-18 is a designation for a style of transistor metal case. The case is more expensive than the similarly sized plastic TO-92 package. The name is from JEDEC, signifying Transistor Outline Package, Case Style 18.
context_section_description: In electronics, TO-18 is a designation for a style of transistor metal case. The case is more expensive than the similarly sized plastic TO-92 package. The name is from  JEDEC, signifying Transistor Outline Package, Case Style 18.
caption: Cross section of a 2N2222 transistor in the TO-18 package
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