The D4600U45X172 from Infineon Technologies is a Power Diode with Forward Current 4450 A, Reverse Current 25 mA, Repetitive Peak Reverse Voltage 4500 V, Non-Repetitive Peak Forward Current 80000 A, Temperature operating range 0 to +140 Degree C. Tags: Ceramic. More details for D4600U45X172 can be seen below.