The SK42BL-TP is an electronic part manufactured by Micron that features Schottky Barrier Diodes (SBD) in an SMB (DO-214AA) package and meets the RoHS directive. It is used to provide protection for a system by preventing permanent damage in the event of over-voltage transients due to electrostatic discharge, lightning strikes, and other events. It also allows for rapid switching in high frequency circuits, often used in communication applications. The device is made of a high-quality silicon material and offers up to 42V of reverse voltage. It has a low forward voltage drop, allowing for greater energy efficiency in circuits, and features an operating temperature range of -55°C to 125°C.