650V Gen 3 power Merged PIN SiC Schottky Diode from Vishay

9th November 2023

Rutronik

Paige West

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Rutronik has augmented its diode portfolio with the introduction of Vishay's third-generation 650V silicon carbide (SiC) diodes, available in current ratings from 4A to 40A.

These diodes employ a Merged PIN Schottky (MPS) architecture, delivering efficient surge resistance and heightened efficiency, attributable to their reduced forward voltage and minimal capacitive charge. In terms of reliability, these diodes have successfully completed 2,000 hours of High Temperature Reverse Bias (HTRB) testing and 2,000 thermal cycles, doubling the AEC-Q101 standard requirements. Their principal uses are found in switching power supplies and in AC/DC PFC and DC/DC ultra-high frequency output rectification within Full-Bridge Phase-Shifted (FBPS) and LLC converters for power generation and research purposes. The diodes are presented in TO-220AC 2L, TO-247AD 3L through-hole packages, and D2PAK 2L (TO-263AB 2L) surface mount configurations and can be sourced from Rutronik.

When contrasted with silicon counterparts of similar breakdown voltage, SiC diodes offer more efficient thermal conductivity, diminished reverse current, and significantly reduced reverse recovery times, largely unaffected by temperature changes. These diodes can perform at temperatures as high as +175°C without efficiency degradation from switching losses.

The MPS design of these diodes ensures robustness against power surges and features a low forward voltage drop of up to 1.46V, capacitive charge of up to 12nC, and reverse leakage current of up to 1.3µA. They are designed for high performance, meeting the MSL-1 rating as per J-STD-020, with a peak temperature tolerance of +245°C, making them ideal for high-speed hard switching across diverse temperatures. Moreover, these 650V Gen 3 Power Merged SiC Schottky diodes are halogen-free and comply with RoHS standards.

Additional advantages include:

Utilisation of Schottky technology on SiC-wide bandgap material for enhanced efficiency due to thinner wafers
Consistent switching performance irrespective of temperature fluctuations
Compliance with JESD 201 class 1A for whisker test requirements

They are typically employed in AC/DC PFC and DC/DC ultra-high frequency output rectification in FBPS and LLC converters across various applications such as servers, telecommunication systems, Uninterruptible Power Supplies (UPS), and solar inverters.