A device may include a metal-oxide varistor (MOV), wherein the MOV increases in temperature as a voltage applied across the MOV exceeds a rated voltage. The device may include a first conductor contacting the MOV and a second conductor contacting the MOV. The second conductor may be configured to disconnect from the MOV when the MOV reaches a threshold temperature. The device may include an enclosure to surround the MOV, the first conductor, and the second conductor, wherein the enclosure includes a non-conductive fluid to suppress arcing.