A power converter comprising: a sealed casing; a first component, a second component and a third component disposed within the sealed casing; and a heat dissipation system comprising: a condenser; a first cooling loop coupled to the condenser, wherein the first cooling loop comprises a first two-phase heat transfer device disposed within the sealed casing, wherein the first two-phase heat transfer device is coupled to the first component and adapted to dissipate heat from the first component; and a second cooling loop coupled to the condenser, wherein the second cooling loop comprises: a second two-phase heat transfer device disposed within the sealed casing, wherein the second two-phase heat transfer device is coupled to the second component and adapted to dissipate heat from the second component, and a first single-phase heat transfer device disposed within the sealed casing and coupled to and disposed upstream relative to the second two-phase heat transfer device, wherein the first single-phase heat transfer device is coupled to the third component and adapted to dissipate heat from the third component; wherein the condenser is disposed outside the sealed casing and disposed above the first and second two-phase heat transfer devices (122, 132); wherein the third component is an auxiliary component and the first and second components (108, 118) are power electronic components that generate substantially more heat than the third component. a sealed casing; a first component, a second component and a third component disposed within the sealed casing; and a heat dissipation system comprising: a condenser; a first cooling loop coupled to the condenser, wherein the first cooling loop comprises a first two-phase heat transfer device disposed within the sealed casing, wherein the first two-phase heat transfer device is coupled to the first component and adapted to dissipate heat from the first component; and a second cooling loop coupled to the condenser, wherein the second cooling loop comprises: a second two-phase heat transfer device disposed within the sealed casing, wherein the second two-phase heat transfer device is coupled to the second component and adapted to dissipate heat from the second component, and a first single-phase heat transfer device disposed within the sealed casing and coupled to and disposed upstream relative to the second two-phase heat transfer device, wherein the first single-phase heat transfer device is coupled to the third component and adapted to dissipate heat from the third component; a condenser; a first cooling loop coupled to the condenser, wherein the first cooling loop comprises a first two-phase heat transfer device disposed within the sealed casing, wherein the first two-phase heat transfer device is coupled to the first component and adapted to dissipate heat from the first component; and a second cooling loop coupled to the condenser, wherein the second cooling loop comprises: a second two-phase heat transfer device disposed within the sealed casing, wherein the second two-phase heat transfer device is coupled to the second component and adapted to dissipate heat from the second component, and a first single-phase heat transfer device disposed within the sealed casing and coupled to and disposed upstream relative to the second two-phase heat transfer device, wherein the first single-phase heat transfer device is coupled to the third component and adapted to dissipate heat from the third component; a second two-phase heat transfer device disposed within the sealed casing, wherein the second two-phase heat transfer device is coupled to the second component and adapted to dissipate heat from the second component, and a first single-phase heat transfer device disposed within the sealed casing and coupled to and disposed upstream relative to the second two-phase heat transfer device, wherein the first single-phase heat transfer device is coupled to the third component and adapted to dissipate heat from the third component; wherein the condenser is disposed outside the sealed casing and disposed above the first and second two-phase heat transfer devices (122, 132); wherein the third component is an auxiliary component and the first and second components (108, 118) are power electronic components that generate substantially more heat than the third component.