Switch having an insulating support

A switch for conducting an electrical current, comprising

• a first external terminal and a planar cover electrode having an inner side and being connected to said first external terminal,
• a second external terminal,
• an insulating support, the first and second external terminals being arranged at said insulating support,
• a temperature-dependent switching mechanism having a switching member changing its geometric shape in temperature-dependent fashion between a closed position and an open position, and an actuating member having a first end and being connected electrically and mechanically in series with the switching member and being fastened with its first end to said inner side of the planar cover electrode, such that, as a function of its temperature said switching mechanism makes an electrically conductive connection for said current between said first and second external terminals,
• wherein the actuating member comprises a spring element having a displacing force that is largely independent of temperature;
• and the switching member has a temperature-dependent displacing force that, in a creep phase of the switching element, is greater than the displacing force of the spring element, and
• a flat self-hold resistor is arranged at said inner side of said planar cover electrode and electrically connected between the cover electrode and the second external terminal.