The OPB991L51Z is a photointerrupter transmissive sensor with a compact 3.18mm package size. It is designed with Photologic technology, providing high sensitivity and reliability in various applications. This sensor features an open collector output and a buffer, making it compatible with automotive systems. With its 5-pin configuration and reliable performance, the OPB991L51Z is an excellent choice for automotive applications that require precise object detection and position sensing. This sensor is conveniently packaged in a bag for easy handling and storage.