Space power portfolio expanded with new radiation-tolerant GaN PoL converter - Electropages

GaN PoL entering orbital service is not a product launch—it is a paradigm shift from ground-redundant to extreme-environment-native power semiconductor design. The upstream bottleneck is unambiguous: space-grade total ionizing dose qualification (>100 krad) will disqualify over 70% of existing GaN epi-wafer lines, leaving fewer than five globally capable manufacturers. That scarcity is the real moat. Downstream, constellation economics are forcing per-satellite power budgets from hundreds to kilowatts, and legacy silicon PoL has hit its volumetric-thermal ceiling. GaN's 10–50 MHz switching advantage lets newcomers match power density with dramatically smaller magnetics, directly eroding the two-decade aerospace dominance of Vicor and TI. The decisive 12–24-month variable is standards capture: ESA and NASA will accelerate radiation-certification frameworks for space GaN devices. Whoever locks in the test methodology and grading taxonomy first locks in the power-supply chain entry point for the next generation of mega-constellations. This is a supply-chain positioning war, not a component announcement.