A method for manufacturing an electromechanical switch, comprising: - manufacturing an electrically insulating support by means of the following steps: - selecting and providing a first plastic having a first temperature heat resistance and a second plastic having a second temperature heat resistance, said first temperature heat resistance being higher than said second temperature heat resistance, wherein at least said second plastic is a thermoplastic; and - manufacturing at least first and second portions of the electrically insulating support with respectively said first and second provided plastics; wherein the method is characterised in that it comprises manufacturing said electrically insulating support as a single piece by at least one of the following two processes: - an overmolding process, comprising manufacturing at least said first portion and then manufacturing at least said second portion by overmolding at least some regions of said first portion with at least said second plastic, or vice versa; and - a multi-material injection process, comprising simultaneously manufacturing and joining at least said first and second portions, and/or other portions of the electrically insulating support also having different temperature heat resistances; and wherein the method further comprises: - providing at least a first, a second and a third electrically conductive elements configured and arranged such that the third electrically conductive element selectively connects the first and second electrically conductive elements; and - attaching the first and the second electrically conductive elements respectively to: - two separated regions (2a, 2b) of said first portion that are either joined by said injection molded second portion or distanced by said overmolded second portion, or - one to the first portion and the other to a third portion made of a plastic having a third temperature heat resistance higher than the second temperature heat resistance, said first and third portions being distanced by the second portion. - manufacturing an electrically insulating support by means of the following steps: - selecting and providing a first plastic having a first temperature heat resistance and a second plastic having a second temperature heat resistance, said first temperature heat resistance being higher than said second temperature heat resistance, wherein at least said second plastic is a thermoplastic; and - manufacturing at least first and second portions of the electrically insulating support with respectively said first and second provided plastics; - selecting and providing a first plastic having a first temperature heat resistance and a second plastic having a second temperature heat resistance, said first temperature heat resistance being higher than said second temperature heat resistance, wherein at least said second plastic is a thermoplastic; and - manufacturing at least first and second portions of the electrically insulating support with respectively said first and second provided plastics; - an overmolding process, comprising manufacturing at least said first portion and then manufacturing at least said second portion by overmolding at least some regions of said first portion with at least said second plastic, or vice versa; and - a multi-material injection process, comprising simultaneously manufacturing and joining at least said first and second portions, and/or other portions of the electrically insulating support also having different temperature heat resistances; - providing at least a first, a second and a third electrically conductive elements configured and arranged such that the third electrically conductive element selectively connects the first and second electrically conductive elements; and - attaching the first and the second electrically conductive elements respectively to: - two separated regions (2a, 2b) of said first portion that are either joined by said injection molded second portion or distanced by said overmolded second portion, or - one to the first portion and the other to a third portion made of a plastic having a third temperature heat resistance higher than the second temperature heat resistance, said first and third portions being distanced by the second portion. - two separated regions (2a, 2b) of said first portion that are either joined by said injection molded second portion or distanced by said overmolded second portion, or - one to the first portion and the other to a third portion made of a plastic having a third temperature heat resistance higher than the second temperature heat resistance, said first and third portions being distanced by the second portion.