ATC Semitec, SEFUSE D6X, thermal fuse

Combined Thermal Fuse/Resistor Acts Fast

News Release from: ATC Semitec Limited
28/02/2007

ATC Semitec's SEFUSE D6X is said to offer a new concept in thermal fuse technology. By combining a thermal fuse element and resistor on a single substrate, NEC has created a fast-acting ultimate protection device for high power DC applications upto 12A/32VDC.

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.