电力电子电路中用作开关或整流器的功率半导体（通常是硅）器件。在集成电路中，它们也被称为功率IC。随着全球对移动电话和便携式电子设备的需求呈指数级增长，电源管理对于最大限度地延长电池寿命，以及在生产可替代能源和LED照明方面发挥作用，变得至关重要。
常见的功率器件包括肖特基二极管或PIN二极管、晶闸管、MOSFET和IGBT。
宽禁带半导体如SiC和GaN较高的击穿电压特性，在需要大电场的大功率应用中十分有用。由于原材料和生产成本较高，它们并没有取代硅在一般功率半导体市场的主导地位，而是被用于先进的航天和军事应用。
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