- Transphorm is a global semiconductor company that develops gallium nitride (GaN) FETs for high-voltage power conversion applications. Built on an industry-leading IP portfolio and over 300 years of combined GaN engineering expertise, Transphorm is delivering the highest performance and highest reliability GaN devices and best-in-class applications-driven design support to a growing customer base. Transphorm is creating innovations that move beyond the limitations of silicon to capture 90% of today’s energy losses.