A surface mount circuit protection device (10) includes a laminar PTC resistive element (12) having first and second major surfaces and a thickness (t) therebetween. A first electrode layer (14) substantially coextensive with the first surface is formed of...

A PTC device formed integrally on a PCB substrate, such a PCB substrate, a secondary battery protection circuit device comprising such PCB substrate provided with a circuit to control the voltage and current of secondary batteries, and a secondary battery ...