Diodes

What about 3N? :-D

Try again. The number refers to the number of leads minus 1. For example a 2N2323 SCR (triple junction device - PNPN) had three leads. And there were 3N devices - fets with substrate connections.

By the way, when I first saw 1N/2N devices, I thought 1N's were diodes, 2N's were NPN transistors, and 2P's were PNP transistors (I never did find the 2P devices, though, haha).


http://www.jedec.org/standards-documents/type-registration-data-sheets (see below)

The term “type designation” used here refers to the number assigned to a solid state device in accordance with JESD370B, Designation System for Discrete Semiconductor Devices. The term “type designation” may be applied to the original number assigned (without suffix) or to a number with a suffix letter. The type designation assignment is designated by a 1N (2 lead) or 2N (3 lead) followed by 4 numbers. The material submitted via an RDF and assigned a type designation is sometimes referred to as a "data sheet", to obtain copies of data sheets, please contact Phileasher Tanner at JEDEC.