The CH605ASR with Magnetic Sensors SOT-23 RoHS is an electronic component manufactured by COSEMITECH. It is a small, surface mount Hall effect device that is used to measure changes in a magnetic field. It consists of a semiconductor Hall circuit, a Schottky diode, and a high sensitivity SOT-23 package. The device comes in RoHS compliant versions and is used in a wide range of applications, such as sensing speed, position, and rotation in automotive, security systems, and consumer electronics.