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The SanRex DD300KB80 is a silicon diode module featuring two internal chips connected in series. It provides a repetitive peak reverse voltage of 800 V and an average forward current rating of 300 A at a case temperature of 91°C. The maximum forward voltage drop is 1.50 V, with a surge forward current capability of 6000 A. The unit utilizes an isolated mounting base for simplified heatsink construction and operates within a junction temperature range of -40°C to +150°C.
Verify the specific part number against official SanRex documentation to confirm electrical ratings and physical dimensions. Ensure thermal management systems align with the specified junction-to-case thermal impedance and operating temperature limits. Confirm compliance with isolation breakdown voltage requirements for the intended circuit topology before finalizing procurement.
Select this component when high surge current capability and robust reverse voltage blocking are required in power conversion applications. The series configuration allows for efficient use in bridge rectifier topologies while maintaining electrical isolation between the mounting hardware and the semiconductor elements. Evaluate thermal dissipation needs based on the specified average forward current conditions.
This device belongs to the DD300KB series of power diode modules manufactured by SanRex Corporation. The series offers wide voltage ratings up to 1600 V across different variants, catering to diverse input voltage requirements. The DD300KB80 specifically addresses applications requiring 800 V blocking capability with high current handling.
Consult official manufacturer cross-reference lists for verified substitutes. Ensure any replacement maintains equivalent or superior ratings for repetitive peak reverse voltage, average forward current, and thermal impedance characteristics.