The B72220S2271K101 with Var MOV 275VAC/350VDC 10000A 430V Radial Bulk manufactured by TDK is a voltage-dependent fuse, or Varistor, which offers surge protection over a 275 Volts AC and 350 Volts DC voltage range with a response time of less than one nanosecond. It has a maximum rated current of 10000 Amps (8/20µs waveform) and a 430 Volt rated breakdown voltage. This device is a radial-lead component that is designed to be soldered onto PCBs in bulk.