An electrical device compriseing a ptc polymer element for...

Details An electrical device compriseing a ptc polymer element for... An electrical device compriseing a ptc polymer element for...

H - Electricity

01

H

H01H 83/00 (2006.01) H01C 7/02 (2006.01) H01H 83/20 (2006.01)

Patent

CA 2331626

The invention relates to an electrical device with a PTC polymer element having a constriction. The constriction defines a web extending in a main current direction over a length longer than in the prior art, namely longer than 5 mm, preferably longer than 15 mm. Further, the aperture angle of the PTC polymer material at the ends of the web is larger than 100°. A preferred choice of material is given, further. The invention achieves very high voltage-withstand capabilities.

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