You are purchasing a lot of 10 of these V47ZA7 Metal Oxide Varistors. The maximum ratings are: 47 Varistor voltage, 30 RMS AC applied voltage, 38 DC applied voltage, 7 joules energy You are purchasing a lot of 10 of these V47ZA7 Metal Oxide Varistors. The maximum ratings are: 47 Varistor voltage, 30 RMS AC applied voltage, 38 DC applied voltage, 7 joules energy