Power Semiconductor Market Heating Up: SiC Accelerates Vehicle Adoption and Energy Transition Resonance, in the Undervalued "Power Highway" Race

In the era where AI chips dominate the spotlight, the power semiconductor lane, a "low-key track," is quietly accumulating strength. Unlike digital chips that handle main processing power, power semiconductors are responsible for energy transformation, control, and transmission, acting as the "traffic hub" of the power system. As the adoption of 800V high-voltage platforms in electric vehicles accelerates and photovoltaic and energy storage installations continue to climb, the demand logic for this track is being revalued by the market. This article dissects the origins and trajectories of the power semiconductor market from three dimensions: demand, supply, and regional structure, and outlines the investment clues embedded within it. ## Power Semiconductors: The "Invisible Protagonist" in the Industry Chain Power semiconductors encompass power devices (IGBTs, MOSFETs, diodes, gate switches, etc.) and power modules, which are the core components for energy conversion. Simply put, almost every place where current flows relies on them: the main drive in electric vehicles, on-board chargers, inverters for photovoltaic power stations, bidirectional converters for energy storage systems, and even industrial motor drives and grid flexible power transmission are all applications for them. Unlike digital chips pursuing nanometer processes, the technological evolution of power semiconductors is more reflected in materials and device structures—shifting from silicon-based devices to third-generation semiconductors like Silicon Carbide and Gallium Nitride. The wider bandgap materials bring higher voltage tolerance, lower losses, and stronger heat dissipation capabilities, which are the scarcest capabilities in high-voltage, high-power scenarios. This determines that power semiconductors are a niche field in the semiconductor industry deeply tied to the "energy revolution." ## Dual Engines of Demand: Electrification and Energy Transition Co-Vibrate ### Electrification: SiC on Board, Value Leap for Single Vehicles Electric vehicles are the first engine for power semiconductor demand growth. As the penetration rate of electrification in major automotive markets continues to rise, the usage of IGBT and SiC devices is increasing rapidly: industry estimates suggest that the value of power semiconductors for traditional gasoline vehicles is in the tens of dollars, whereas a pure electric vehicle can increase to several hundred dollars; if 800V high-voltage platforms equipped with all SiC drive solutions are adopted, the value will rise further. The more critical change is that 800V platforms are shifting from high-end models toward mid-range models. High-voltage platforms combined with SiC devices can significantly shorten charging times and improve range efficiency, directly addressing consumer pain points. When SiC shifts from "option" to "standard," the material switch in drive inverters will bring a decisive price and volume surge, which is the most volatile part of the power semiconductor market. ### Energy Transition: Photovoltaics, Energy Storage, and Grid Investment Launch Three Arrows Simultaneously The second engine comes from the energy side. The power quality of solar and wind power is naturally "unstable," requiring connection to the grid via inverters and converters; energy storage systems need to complete charge/discharge switching in milliseconds, also heavily relying on power devices. Furthermore, the increase in new energy share drives grid flexibility transformation, and new scenarios like flexible DC transmission and solid-state transformers open up incremental space for high-voltage, high-power devices. The convergence of these three forces means that the demand curve for power semiconductors no longer simply follows the inventory cycle of consumer electronics, but is more determined by medium-to-long-term capital expenditure. Demand resilience is significantly stronger than that of traditional chip categories. This is also a major reason why the market is beginning to revalue this track. ## Supply Landscape: Technological Stratification and Capacity Competition From the supply side, power semiconductors show clear "technology stratification": High-end SiC devices and automotive-grade IGBT modules are still dominated by a few major IDMs, with capacity ramp-up and yield improvement being core barriers. Mature products like mid-to-low voltage MOSFETs face intense competition, offering greater price elasticity. In recent years, leading manufacturers have expanded SiC substrates and promoted 8-inch production lines, intensifying vertical integration in the industry, and the vertical layout across substrate, epitaxy, and device stages is reshaping competitive thresholds. For downstream automakers, the security of power device supply is directly related to production pace; signing long-term orders and locking capacity has become the norm. This means that leading device manufacturers have higher order visibility, while second and third-tier manufacturers need to find differentiation breakthroughs in specific scenarios; industry segmentation is worth continuous attention. ## Thailand Perspective: From Auto Factories to Power Device Hub Thailand is an excellent window to observe the power semiconductor market trend. As the largest automotive manufacturing base in Southeast Asia, Thailand hosts a large number of international automakers and Tier 1 suppliers, and has recently actively attracted Chinese EV manufacturers to establish local plants. The pace of electrification transition in Southeast Asia is leading the way. Vehicle assembly is right at the doorstep, meaning the localizing demand for power modules, power control systems, and related electronic components will continue to be released. For local Thai enterprises, opportunities are concentrated in three areas: First, the packaging and testing stage. Power module packaging requires high demands for thermal management and reliability processes, involving both capital and human resources, fitting Thailand's industrial endowment. Second, the supply of electronic components and passive devices; power semiconductors require a large support from surrounding components. Third, the channel value for Southeast Asian new energy infrastructure. The dense deployment of photovoltaic and energy storage projects gives Thai enterprises the opportunity to play a role as a regional supply chain node. ## Investment Logic and Risk Warning For investors, the key points for power semiconductor market trends can be summarized into three main lines: * Material Upgrade Line: Focus on the progress of capacity realization in the SiC substrate, epitaxy, and device stages. Changes in the cost curve under the trend toward 8-inch production are key indicators. * Automotive Specification Price Line: Manufacturers that can enter the automotive supply chain and pass vehicle certification will gain higher order stability and profit margin protection. * Regional Supporting Line: Enterprises in Southeast Asian packaging and testing and electronic components, taking Thailand as an example, are expected to capture the certainty demand for localizing electrification. Risks should not be overlooked: First, if the SiC expansion boom outpaces demand release, it may lead to temporary price competition. Second, intensifying competition in mature product categories like IGBTs may result in lower-than-expected profit elasticity. Third, changes in EV subsidies and energy policies will directly affect the pace of demand; power semiconductors are more sensitive to policy changes than consumer chips. Investors should dynamically adjust expectations based on order data and certification progress. ## Conclusion Power semiconductors lack the light rings of AI chips, but they represent the "physical foundation" of the two super lines of electrification and energy transition. When market attention is overly focused on computing power, this track connecting energy and semiconductors may offer a more accommodating entry window for patient capital. For readers of ThaiChipNet, continuously tracking SiC adoption in vehicles, localizing orders in Thailand, and breakthroughs in vehicle certification will be the three keys to grasping the power semiconductor market trend.