OSG5DA3131A-1MA is an Optosupply Opto Interrupter. It is an SMD type non-contact optical transmissive sensor, which is applicable for use in various kinds of applications. It features a built-in IRED and phototransistor, within a high speed switching and a robust mechanism, which allows precise input/output transmission. It is highly reliable, suitable for detection of any object's entry and exit due to its narrow beam and high-speed response. In terms of the connection between the two parts, the standard type has a two-pin connection while the through-hole type has a four-pin connection. The size of the sensor is small, making it ideal for use in applications where space is a limiting factor. Furthermore, it has an exceptional environmental resistance, with a wide operating temperature range, long operating life and low power consumption.