https://www.rirpowersemi.com/ ADVANCING POWER EFFICIENCY 27 www.power-mag.com Issue 1 2026 Power Electronics Europe Parameter SiC Schottky Diode (SBD) SiC Merged-PiN Schottky (MPS) Diode Customer Value Conduction Mechanism Majority carrier (Schottky) Majority carrier with PiN assist Best of both worlds Reverse Recovery Near-zero Near-zero High-frequency efficiency Forward Voltage (Nominal Load) Low Low Comparable efficiency Forward Voltage (High Current / Surge) Increases rapidly Stabilized via PiN conduction Improved overload handling Leakage Current @ High Temperature Higher Significantly lower Better high-temp reliability Surge Current Capability Limited High Robust against inrush & faults Avalanche Capability Limited Enhanced Grid and industrial resilience Thermal Stability Moderate Superior Extended operating range System Derating Required Higher Lower Smaller, lower-cost systems Typical Use Case Light to medium duty Mission-critical, High stress Broader applicability Comparison of SiC MPS vs. SiC Schottky Diodes As depicted below, RIR Power’s MPS diodes remove the need to choose between efficiency and ruggedness. 1. Superior Surge Current Capability MPS diodes can safely conduct significantly higher surge currents due to the activation of PiN regions during overload events. This makes them far more robust in real-world systems exposed to inrush currents, short circuits, and grid disturbances. 2. Lower Leakage at High Temperature While standard SiC Schottky diodes experience rapidly increasing leakage current as junction temperature rises, MPS structures suppress leakage through their PiN regions—enabling stable operation at elevated temperatures. 3. Improved Avalanche and Blocking Robustness The merged structure enhances highvoltage blocking stability and avalanche capability, making MPS diodes better suited for high-voltage DC-link and gridtied applications. 4. Near-Zero Reverse Recovery Performance Like Schottky diodes, SiC MPS diodes remain majority-carrier devices during normal operation, preserving ultra-fast switching and negligible reverse recovery losses—critical for high-frequency power conversion. 5. Enhanced System Reliability By combining efficiency with fault tolerance, MPS diodes reduce the need for over-design, snubber circuits, and excessive derating, improving overall system reliability and lowering total cost of ownership. Forward Surge Capability, IFSM Application Impact RIR’s SiC MPS diodes enable higher system efficiency and reliability across
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