Power semiconductors are the core devices of power electronic systems, bearing the critical functions of energy conversion, control, and distribution. With the explosive growth of emerging applications such as new energy vehicles, renewable energy, AI data centers, and industrial automation, the power semiconductor market is undergoing a generational leap from silicon-based to wide-bandgap materials. According to GM Insights, the global power semiconductor market reached $55.7 billion in 2025, is expected to grow to $58.8 billion in 2026, and is projected to exceed $97.5 billion by 2035. Currently, three technology paths—IGBT, SiC MOSFET, and GaN devices—are developing in parallel, dominating medium-to-high voltage, high-frequency high-efficiency, and medium-to-large power scenarios respectively, jointly driving the global energy efficiency revolution.

IGBT

Insulated Gate Bipolar Transistor (IGBT), as a mature representative of silicon-based power semiconductors, remains irreplaceable in rail transit, industrial inverters, and medium-to-low voltage platforms for new energy vehicles, thanks to its high voltage withstand capability, large current carrying capacity, and mature industrial chain. Key IGBT metrics include the trade-off between conduction voltage drop VCE(sat) and turn-off loss Eoff, short-circuit withstand capability, junction temperature cycling lifetime, and long-term failure-in-time (FIT) performance in coordination with module packaging and thermal management systems.

The global power semiconductor packaging equipment market is expanding at a compound annual growth rate exceeding 10%, with the Chinese market showing even more pronounced growth. International giants such as Infineon, Mitsubishi Electric, Fuji Electric, and Semikron Danfoss dominate the high-end market, while domestic players including BYD, Starpower, and CRRC Times Electric are accelerating their catch-up in new energy vehicles and photovoltaic energy storage. As SiC/GaN costs continue to decline, IGBT is gradually ceding ground in low-to-medium power applications, but will maintain its core position in high-power, high-reliability fields for the long term.

SiC MOSFET

Silicon carbide, as a representative third-generation semiconductor material, has become the ideal choice for 800V-and-above high-voltage platforms thanks to its 3.26eV wide bandgap, high breakdown electric field, and excellent thermal conductivity. SiC MOSFETs in electric vehicle main-drive inverters can reduce energy losses by up to 50% while enabling more compact system designs.

In 2024, STMicroelectronics led the global SiC power device market with $1.1 billion in revenue, followed by onsemi ($820 million) and Infineon ($734 million). Infineon's CoolSiC™ series has deeply penetrated photovoltaic inverters and wind power systems, while Wolfspeed focuses on substrate and device supply leveraging its vertical integration advantages. Domestic manufacturers such as Sanan Optoelectronics and Basic Semiconductor are growing rapidly, benefiting from the strong pull of the local new energy vehicle industrial chain.

The most significant supply-side shift in the SiC industry over the past two years has been the migration from 6-inch to 8-inch wafers: a single 8-inch substrate offers approximately 1.8 times the usable area of a 6-inch wafer, increasing chip output by nearly 90%, with unit costs expected to decrease by 35% after scaled production. Domestic players including Silan Microelectronics and CRRC Times Electric have brought 8-inch SiC lines into operation, with fourth-generation trench-gate products completing qualification.

GaN Devices

Gallium nitride, with its higher electron mobility and lower on-resistance, demonstrates exceptional switching performance and power density in the 200V–650V low-to-medium voltage range. GaN power transistors can reduce charger volume by 60% and increase switching speed by more than 10 times. According to Infineon's forecast, the GaN power semiconductor market will reach $920 million in 2026 and approach $3 billion by 2030, representing a compound annual growth rate of 44%.

Infineon commands a 25% global market share with its CoolGaN™ series, and its 300mm GaN manufacturing technology achieved mass production in July 2025. Navitas Semiconductor focuses on monolithically integrated GaN power ICs, onsemi enters the high-voltage track with its GaN-on-GaN vertical architecture, and Innoscience is rising rapidly based on cost advantages from 8-inch silicon-based GaN wafers. Application scenarios have expanded from consumer electronics fast charging to AI data center power supplies, on-board chargers, and humanoid robot drives. Additionally, Renesas Electronics and Hongwei Aisai have identified GaN as a core growth driver for 2026, with strategic focus on humanoid robot servo drives and AI data center high-efficiency power supplies.

Conclusion

The competitive landscape of the power semiconductor industry presents differentiated specialization: SiC MOSFETs dominate 800V-and-above high-voltage platforms (such as EV main drives and photovoltaic plants) with superior high-voltage and high-temperature performance; GaN devices lead low-to-medium voltage high-frequency high-efficiency applications (such as fast charging, data centers, and OBCs) with extreme high-frequency and high-efficiency characteristics; and IGBTs defend medium-to-large power mature markets (such as industrial motor drives and rail transit) with reliability and cost advantages. In the future, multi-material fusion system-level solutions will become the mainstream direction of power semiconductor technology evolution.

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