The accurate information of US5881KUA-AA-000-BU product indicates:
K: (-40 to 125°C) 
UA: TO92-3L package
BU:=Bulk
The Meilaixin US5881KUA-AA-000-BU is a single pole Hall effect switch designed using mixed signal CMOS technology. This device integrates a
The voltage regulator, Hall sensor with dynamic offset elimination system, Schmitt trigger, and a drain open circuit output driver are all integrated in one package.
Due to its wide operating voltage range and extended temperature range selection, it is suitable for automotive and solid-state switch applications. This device uses a thin small form factor transistor (TSOT)
Delivered with plastic single row straight tube (TO-92 flat) for surface mount technology. Both types of 3-pin packaging comply with RoHS standards.