High current thermal fuses (HCTF) are high current, high temperature operating devices that open automatically and disconnect the circuit if exposed above 235°C.  These are used primarily in automotive applications.

More complex than it looks, materials used for these devices must have very high thermal stability and pass stringent AEC-Q200 automotive specifications.

Key Application Considerations:

• Products must be map-molded
• Devices generates significant heat that must be dissipated
• Minimum MSL level of 4

Key Material Properties:

• Strength after Thermally conductive > 2.7W/mK
• Tg must be higher than 135°C
• CTE must be less than 20 ppm