A medical electrical lead includes an inductance augmenter assembly. An embodiment of the present invention also provides a method and apparatus that effectuates testing access, directly to the internal die component of the surface mount package or to a particular circuit node or conductive trace locale of the surface mount package, enabling performance evaluation and system debugging. The invention provides a flat cable connector featuring a convenient and quick installation, a secured structure and an easy way of changing components. Therefore, in the two-stage pressurizing refrigeration cycle device, COP can be improved with a simple structure and control.