66 ns recovery — the switching-loss ceiling
The IDW60C65D1XKSA1 is an Infineon Rapid 1 series dual common-cathode fast recovery diode array rated at 650 V and 30 A average rectified current per diode. Its 66 ns reverse recovery time places it in the fast-recovery class for hard-switching PFC stages, boost converters, and output rectification in the 1–3 kW range.
Forward drop and thermal budget
At 1.7 V typical forward drop at 30 A per diode, the conduction loss at full load runs about 51 W per die. That heat has to leave through the TO-247-3 tab — the copper pad area on the heatsink side sets the junction-to-case thermal resistance, and the 175 °C max junction rating means the heatsink must keep the case below roughly 125 °C at full load to stay inside the SOA.
