Miniature safety switch

A miniature safety switch for use in motor vehicle electronics, the miniature safety switch comprising:

• a housing having a housing base made of an insulating material and a housing cover that can be fitted, or is fitted, on said housing base, said housing base having a base side;
• first and second elongate and flat contact arms embedded parallel to one another in terms of a longitudinal direction thereof in said housing base and protrude out at said base side from said housing base;
• a fixed contact disposed in said housing and attached to said first contact arm;
• a bimetallic snap disk having a moving contact and attached to said second contact arm;
• a compression spring being supported on said first contact arm beneath said fixed contact in the longitudinal direction;
• a positive temperature coefficient (PTC) resistor being electrically incorporated in such a way that, as a result of heat generated by said PTC resistor, said bimetallic snap disk remains in an open position thereof in an event of triggering, said PTC resistor being brought into direct contact with said bimetallic snap disk by means of said compression spring;
• and
• said compression spring being a conical spring having a base-side spring end contacting said first contact arm and an apex-side spring end contacting said PTC resistor.