B72220S2301K101 from EPCOS (TDK) is a metal oxide varistor in the TVS - Varistors, MOVs category, intended for surge and transient protection in electronic circuits exposed to overvoltage events. Engineers typically consider MOV devices like this for power entry stages, industrial equipment, consumer electronics, telecom hardware, and other designs that need a compact sacrificial protection element against line disturbances. Its value lies in helping improve system robustness, reduce stress on downstream components, and support more reliable operation in electrically noisy environments. This part is generally positioned for designers seeking established surge suppression technology from a widely recognized protection-component manufacturer. The current lifecycle status for B72220S2301K101 is information not available, so teams should verify availability and long-term support directly with EPCOS (TDK) or authorized distribution before committing to new designs. RoHS compliance information is also not available in the provided data and should be confirmed using the latest manufacturer datasheet or compliance documentation.