Product safety standards require fuses for primary AC power protection and secondary protection against any catastrophic failure in the input filter capacitors, Power Factor Correction (PFC) boost module, output capacitors, or within the DC-DC converters. Fuse F1 is shown in the recommended AC fuse location. The fuse is placed near the input connector so that all other components are down stream and protected. Although the primary input line fuse will eventually open, DC fuses positioned right at the input to the DC-DC converters will limit the energy delivered by the hold-up capacitors and prevent damage to the PFC boost module. DC fuses between the PFC and DC-DC converters (F2 and F3) protect against a catastrophic failure in the DC-DC converter. Fusing each DC-DC converter will allow the converter not subject to a fault to continue operating by isolating the failed converter. Fuses F2 and F3 have an added benefit during product development. By selectively removing these fuses, the various converters can be powered separately, or the PFC operated with an external load. In addition to facilitating testing of the different power sections during product development, the fuses can aid troubleshooting in production and in the event the product needs to be repaired.