The second step is identifying the maximum inrush current. Users may determine this from reviewing what components are inline with the inrush current limiter such as a diode bridge. In the case of a diode bridge rated at 200A, it is best to select a CL inrush current limiter that would limit the maximum surge current to 50% of the rating, therefore limiting the surge to a maximum of 100A. Step three for the designer is to understand the bulk capacitance at the RMS voltage rating of the system. Once the input capacitance is known, the selection of the CL series inrush current limiter needs to be able to absorb the input energy.