Pressure sensitive resistance type over-pressure safety device

This utility model discloses a pressure sensitive resistance crowbar protector, which consists of a pressure sensitive resistive mass RV and a thermal cut-out tube 6. The pressure sensitive resistive mass RV comprises an electrode 1, an electrode 2, a metal film 3, a metal film 4 and a chip 5, whose both sides are painted with metal film 3 and metal film 4. The electrode 1 is connected to the metal film 3, the electrode 2 is connected to the metal film 4, and the thermal cut-out tube 6 closely attaches to the pressure sensitive resistive mass RV. The pressure sensitive resistive RV is capable of a plurality of metal film painting plans, and both sides of the chip 5 are capable of being painted into two or more than two mutually indepterminalent metal film sections. This utility model has the beneficial effects of quick response, safety and reliability and it is capable of wide application in the crowbar protection system and thunder-proof system of electronic appliances, network appliances, domestic appliances, electric power appliances.