An electric heater (100, 200, 300, 400) for household appliance comprising - a metal body (101, 201, 301, 401) defining or provided with at least one conduit (102, 202, 302, 402) for the passage of a fluid, in particular water or an aqueous solution, to be heated; - at least one electric heating device (104, 204, 304, 404), fixed to the metal body (101, 201, 301, 401), adapted to generate heat when it is electrically powered, and to transmit heat to the metal body (101, 201, 301, 401) to heat the fluid in said at least one conduit (102, 202, 302, 402); - means (105, 205, 305, 405), in particular heat storage means, comprising a phase change material, constrained to the metal body (101, 201, 301, 401), the phase change material being adapted to pass at least from a first phase to a second phase, and vice versa, in a temperature range; characterized in that said temperature range is from 80 to 140 °C or from 120 to 140 °C; in that the electric heater (100, 200, 300, 400) comprises at least one safety device (209, 309), in particular at least one electromechanical safety device, adapted to interrupt the power supply to the at least one electric heating device (104, 204, 304, 404) when said at least one electric heating device (104, 204, 304, 404) reaches a predetermined temperature; and in that said at least one safety device (209, 309) is fixed to the metal body or to said means. - a metal body (101, 201, 301, 401) defining or provided with at least one conduit (102, 202, 302, 402) for the passage of a fluid, in particular water or an aqueous solution, to be heated; - at least one electric heating device (104, 204, 304, 404), fixed to the metal body (101, 201, 301, 401), adapted to generate heat when it is electrically powered, and to transmit heat to the metal body (101, 201, 301, 401) to heat the fluid in said at least one conduit (102, 202, 302, 402); - means (105, 205, 305, 405), in particular heat storage means, comprising a phase change material, constrained to the metal body (101, 201, 301, 401), the phase change material being adapted to pass at least from a first phase to a second phase, and vice versa, in a temperature range; characterized in that said temperature range is from 80 to 140 °C or from 120 to 140 °C; in that the electric heater (100, 200, 300, 400) comprises at least one safety device (209, 309), in particular at least one electromechanical safety device, adapted to interrupt the power supply to the at least one electric heating device (104, 204, 304, 404) when said at least one electric heating device (104, 204, 304, 404) reaches a predetermined temperature; and in that said at least one safety device (209, 309) is fixed to the metal body or to said means. the phase change material being adapted to pass at least from a first phase to a second phase, and vice versa, in a temperature range; characterized in that said temperature range is from 80 to 140 °C or from 120 to 140 °C; in that the electric heater (100, 200, 300, 400) comprises at least one safety device (209, 309), in particular at least one electromechanical safety device, adapted to interrupt the power supply to the at least one electric heating device (104, 204, 304, 404) when said at least one electric heating device (104, 204, 304, 404) reaches a predetermined temperature; and in that said at least one safety device (209, 309) is fixed to the metal body or to said means.