Mitsubishi Electric's New 6.5 kV Full-SiC Power Semiconductor Module Achieves World's Highest Power Density

Will lead to smaller, more efficient power equipment for railcars and electric power systems

TOKYO — (BUSINESS WIRE) — January 30, 2018Mitsubishi Electric Corporation (TOKYO:6503) announced today that it has developed a 6.5 kV full silicon carbide (SiC) power semiconductor module that is believed to offer the world’s highest power density (calculated from rated voltage and current) among power semiconductor modules rated from 1.7 kV to 6.5 kV. The unprecedented power density is made possible by the model’s original structure with integrated metal-oxide-semiconductor field-effect transistor (MOSFET) and diode on single chip and its newly developed package. Mitsubishi Electric expects the module to lead to smaller and more energy-efficient power equipment for high-voltage railcars and electric power systems. Going forward, the company will continue to further develop the technology and conduct further reliability tests.

Features

1) Highest rated voltage in full-SiC modules should lead to smaller and more efficient power electronics equipment

  • 6.5 kV rated voltage is highest among silicon insulated-gate bipolar transistor (IGBT) power semiconductor modules
  • Full-SiC technology improves power density and efficiency and enables higher operating frequencies for smaller and more energy-efficient high-voltage power electronics equipment

2) Original one-chip structure and new package for high heat dissipation and high heat tolerance

  • Chip area reduced drastically thanks to integrating MOSFET and diode on single chip
  • Insulating substrate with superior thermal properties and reliable die bonding technology facilitate heat dissipation and heat tolerance
  • 9.3 kVA/cm3 power density is world’s highest among power semiconductor modules rated from 1.7 kV to 6.5 kV

Details
Mitsubishi Electric’s SiC power semiconductor modules cover a full range of rated voltages, including its new full-SiC power module rated at 6.5 kV, tops among silicon IGBT power semiconductor modules. Conventionally, power circuits use two power semiconductor modules connected in series, which requires high voltage in excess of the modules’ rated voltages. The new single module with a higher rated voltage significantly simplifies the circuit. Also, replacing silicon IGBT modules with full-SiC modules substantially reduces switching loss.

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