How does the breakdown voltage of a transistor technology affect maximum output power?

Power amplifier classes are defined by the transistor's conduction angle and the output network topology. Linear classes: Class A: conducts 100% of the RF cycle (conduction angle = 360°). Maximum theoretical efficiency: 50%. Best linearity. Used for: driver stages, small-signal amplifiers, lab equipment. Class AB: conducts 180°-360° of the cycle. Efficiency: 50-78.5% depending on bias. Good linearity with moderate efficiency. Used for: most communication PAs (cellular, Wi-Fi). Class B: conducts exactly 180° (half cycle). Maximum efficiency: 78.5%. Crossover distortion at zero crossing. Used for: push-pull linear amplifiers. Class C: conducts < 180°. Efficiency: up to 90%. Highly nonlinear (suitable only for constant-envelope signals like FM). Switching classes: Class D: transistor switches between saturation and cutoff, drives a tuned output network. Efficiency: theoretically 100%. Used at lower frequencies (< 100 MHz). Class E: uses transistor as a switch with a specific output network that shapes voltage and current waveforms to achieve zero-voltage switching. Efficiency: theoretically 100%, practically 80-95%. Class F: uses harmonic tuning to shape the drain waveform into a square wave (voltage) and half-sine (current). Efficiency: theoretically 100%, practically 75-90%.