The Kemet R76PF21805050J is a 0.018µF film capacitor with a maximum working voltage of 630V and a rated operating voltage of 400V. It has polypropylene (PP) metallized radial construction, making it suitable for use in a variety of electronic applications, including AC line filter line-by-pass, snubber, high voltage spark protection, and discharge circuits. The film capacitor also features a high dielectric strength, low ESR, and excellent stability over time and temperature, making it a reliable and efficient choice for many applications.