The SC4003UA with TO-92 Hall Sensor ROHS is a Hall-effect based sensor that is manufactured by Semiment. It has a switching action on the sensing element, and is meant for detecting the presence of a magnet. The sensor is housed in a TO-92 package and comes with full RoHS compliance, making it suitable for use in a wide range of applications. It has a stable quiescent current, low power consumption, and a fast turn-off time. The sensor is compatible with a wide range of Hall-effect switches, and is ideal for applications such as magnetic switches, angle sensing, speed sensing, and current sensing.