Graphite Sheet Application on Switch

Simulate the hotspot area inside the switch, and test the temperature change of hot spot with graphite and without graphite under the same conditions.

1. Test method：

a. Test in a constant temperature and humidity box, temperature 23~25℃, humidity: 30~70%

b. Install a heating sheet in the inner area of the switch to simulate the heat generated when the switch is loaded.

c. Heating temperature The power of heating temperature is about 3.5W.

d. The hot spot position on the back of the heating sheet was obtained by infrared thermal imager.

e. Test time：3min

2. Infrared imager took the highest temperature point.

3. Temperature rise ∆T/℃ data chart comparison

4. Conclusion:

Precision air switch will generate a lot of heat in the process of high load, if the heat dissipation is not timely, it is easy to cause short circuit and the hidden danger of peripheral line failure. By simulating the switching power load process scene, comparing the heat dissipation temperature difference ∆T under two states of with graphite and without graphite on the switch; From the above data chart, it can be clearly seen that the switch temperature without graphite is high to 150.2 °C close to the temperature 161.1°C of directly heated heat source; The graphite temperature is only 49.5℃, temperature difference ∆T/100.7℃, so the graphite sample can be very good for the hot spot temperature, plays an important role in ensuring product safety .