A regulator circuit for use with integrated circuits protects downstream devices from the application of unregulated voltages during start-up or other initialization. The antioxidant is preferably a hydralazine compound or a pharmaceutically acceptable salt thereof. First and second movable electrical contacts are mounted on the bottom surface of the thermostatic disc positioned to move into and out of engagement with respective stationary contacts upon snapping of the thermostatic disc from one dished configuration to an opposite dished configuration in dependence on temperature of the disc.