Surface mountable over-current protection device

A surface-mountable over-current protection device having opposite upper and lower surfaces, a first lateral surface and a second lateral surface, the first and second lateral surfaces being opposite to each other and interconnecting the upper and lower surfaces;

• the over-current protection device comprising:
• a PTC material layer having opposite first and second surfaces and comprising crystalline polymer and conductive filler dispersed therein, the PTC material layer having a resistivity less than 0.18 Ω-cm;
• a first conductive layer in physical contact with the first surface of the PTC material layer;
• a second conductive layer in physical contact with the second surface of the PTC material layer;
• a first electrode comprising a pair of first metal foils at the upper and lower surfaces, and being electrically connected to the first conductive layer and isolated from the second conductive layer;
• a second electrode comprising a pair of second metal foils at the upper and lower surfaces, and being electrically connected to the second conductive layer and isolated from the first conductive layer;
• and
• a first electrically conductive connecting member formed at the first lateral surface and connecting to the first metal foils and the first conductive layer;
• a second electrically conductive connecting member formed at the second lateral surface and connecting to the second metal foils and the second conductive layer;
• wherein the first electrically conductive connecting member comprises 40%-100% by area of the first lateral surface, and the second electrically conductive connecting member comprises 40%-100% by area of the second lateral surface.