Patent ID: 7358842

Claim:
A wire-winding common mode choke comprising: a body having two initial welding points and two ending welding points respectively formed on four corners of a surface of the body; two channels respectively defined in two lateral sides of the body; and at least two steps formed respectively between the channels and the initial and ending welding points, and each one of the at least two steps having a first folding end formed adjacent to a corresponding welding point; and a second folding end formed adjacent to a corresponding channel; a first coil wired around the channels in the body and having a starting end connecting to a corresponding initial welding point across a corresponding first folding end of a corresponding step; and a final end connecting to a corresponding ending welding point across a corresponding first folding end of a corresponding step; and a second coil wired around the channels in the body and having a starting end connecting to a corresponding initial welding point across a corresponding second folding end of a corresponding step; and a final end connecting to a corresponding ending welding point across a corresponding second folding end of a corresponding step.