Combined Thermal Fuse/Resistor Acts Fast

The D6X works on two principles. Firstly it operates like a conventional thermal fuse which will open when the local ambient temperature reaches the fuses operating temperature. Secondly it responds to an over-current signal from a monitoring circuit which self-heats the resistor thus opening the adjacent fuse.

The D6X was designed to fit neatly in the space between adjacent MOSFETS thus improving response time and minimising board space required.