To provide an electronic device comprising a PTC element without lead and sufficiently reduced in residual current by setting a rate of change of resistance in one of two PTC elements so as to satisfy a specified equation.

In a degaussing device 10, a rate of change of resistance α10-100 (%/°C) in a heating PTC element 2 out of a degaussing and a heating PTCs 1 and 2 is set lower than a normal value and satisfies an equation, and satisfies 2≤α10-100≤15 (where α10-100=230×log(100/10)/(T100-T10), T100 is a temperature at which a resistance becomes 100 times the reference resistance, and T10 is a temperature at which a resistance becomes ten times the reference resistance). The degaussing PTC element 1 is connected in series to a degaussing coil 3 and overcurrent attenuated at the degaussing PTC element 1 is degaussed by alternative current at the degaussing coil 3. A series circuit of the degaussing PTC element 1 and the degaussing coil 3 is connected in parallel to the heating PTC element 2. The degaussing PTC element 1 is thermally connected to the heating PTC element 2 and becomes high temperature.