Within MOS8, there are both MOSFETs and FREDFETs. The difference between a MOSFET and FREDFET is that a FREDFET has a fast body diode that is used in soft switching applications such as resonant mode and zero voltage switching (ZVS) topologies. Once the body diode has carried forward current, all of the charge must be removed from the device before the MOSFET can support high voltage in the OFF position. The fast recovery body diode of a FREDFET accomplishes this faster then the diode of a MOSFET. If the diode carries forward current, a FREDFET must be used to guarantee reliable operation. The MOSFET will operate at a higher operating temperature of 150°C versus 125°C for a FREDFET. The reason for this is that in order to make the FREDFET body diode quicker, additional processing must take place. One process step creates damage in the crystal lattice of the device with the following process repairing the damage. However, all the damage is not repaired and hence there is slightly higher leakage in the FREDFETs. As temperature goes up so does leakage, therefore the maximum temperature is reduced on the FREDFETs. The MOSFET will also have a slightly lower ON resistance, again due to the extra processing that is done in order to make the FREDFETs body diode quicker. Additionally, the FREDFET also has a slightly higher price due the additional processing. Overall, if a MOSFET is being used, a FREDFET can be used in its place. However, if a FREDFET is being used, a MOSFET cannot be used.