Tape & Reel (TR) is the way it's packaged.This file is included in package TO-236-3, SC-59, SOT-23-3.This LED driving board is mounted using the mounting type Surface Mount.There is a NDC3105 family of things that it belongs to.
NDC3105LT1 Features
NDC3105LT1 Applications
There are a lot of ON Semiconductor NDC3105LT1 Power Switches ICs applications.