ElectronicsThe NTE5240A is an electronic part manufactured by NTE Electronics, which is a diode Zener stud with 50W, 3.9V, DO5 Package, bulk, and 150uA current. The part is primarily used as a voltage regulator and protection circuit, providing a stable regulated voltage output despite fluctuation in input voltage. It has a high temperature coefficient and can operate up to 215°C. Additionally, it is RoHS Compliant, allowing for its use in lead-free applications.