Devices and methods related to MOV having modified edge

An electrical device comprising:

• a first metal oxide varistor (MOV) including a first metal oxide layer with an external side and an internal side with a first shaped depression, a first external electrode on the external side of the first metal oxide layer, and a first internal electrode covering some or all of the first shaped depression, the first internal electrode having an edge portion that flares away from the first external electrode;
• a second MOV including a second metal oxide layer with an external side and an internal side with a second shaped depression, a second external electrode on the external side of the second metal oxide layer, and a second internal electrode covering some or all of the second shaped depression, the second internal electrode having an edge portion that flares away from the second external electrode;
• and
• a seal implemented between the internal side of the first metal oxide layer and the internal side of the second metal oxide layer, such that the first and second internal electrodes form a gas discharge tube (GDT).

An electrical device comprising:

• a first metal oxide varistor (MOV) including a metal oxide layer having a first side and a second side, and first and second electrodes implemented on the first and second sides of the metal oxide layer, respectively, each electrode including a laterally inner portion and an edge portion, at least one of the first and second electrodes configured such that a parameter associated with the first MOV at an edge of the edge portion of the respective electrode has a magnitude that is within a selected range of a magnitude of the parameter at a center of the electrode;
• and
• a second MOV coupled to the first MOV with an electrically insulating seal, the second MOV including a metal oxide layer having a first side and a second side, and first and second electrodes implemented on the first and second sides of the metal oxide layer, respectively, each electrode including a laterally inner portion and an edge portion, at least one of the first and second electrodes configured such that a parameter associated with the second MOV at an edge of the edge portion of the respective electrode has a magnitude that is within a selected range of a magnitude of the parameter at a center of the electrode, the first and second MOVs oriented so that their first sides face each other, such that the first electrodes of the first and second MOVs form a gas discharge tube (GDT).