Self-adjusting hot box

A self-adjusting hot box for testing hot property of an electrical component comprising:

• a box having a supporting board disposed therein;
• a heater placed in the box for heating the electrical component;
• a thermostat electrically connecting the heater for controlling operation of the heater;
• and
• a power supply for providing power to the thermostat and the heater.

A method to establish a thermal test environment for an electrical device, comprising the steps of:

• preparing a box with a temperature-controllable space therein;
• equipping said box with a heater capable of raising temperature of said space;
• ventilating said space of said box with an outside of said box;
• and
• controlling said temperature of said space of said box by means of said heater and said ventilating step.