The B72214S511K101 is a varistor with through-hole mounts, manufactured by TDK. It is a RoHS (Restriction of Hazardous Substances) compliant component, meaning that it is practically safe to use and designed with environment safety in mind. The varistor is a voltage-dependent resistor, which means that it has a variable resistance depending on the voltage applied to it. The resistance decreases as the applied voltage increases. This makes it a great component for protecting against voltage spikes and surges. The B72214S511K101 is rated for a maximum peak current of 270 joule-seconds per pulse and a maximum dissipation of 10 watts. It has a rated clamping voltage of 650 volts AC and a rated capacitance of 22,000 picofarads. The B72214S511K101 can be used in a variety of applications, such as surge protection circuits or high-voltage transients. Its through-hole mounting design makes it easier to install in printed circuit boards (PCB), and its RoHS compliant designmakes it safe to use in any environment.