The NuPower 05E05A is a compact and highly efficient solid-state power amplifier (PA) module for S-band applications. The amplifier operates from 2000 to 2600 MHz and provides 30 Watts of CW power on average and near-constant-envelope waveforms. The connectorized PA module accepts a nominal 0 dBm (1 milliwatt) input signal and provides 44 dB of RF gain while operating at 40% DC power efficiency with a +28 VDC supply. It is available in an aluminum chassis that measures 4.50” x 3.50” x 0.61” and weighs only 9 ounces. The NuPower 05E05A is small and lightweight, ideal for communications, telemetry and electronic warfare systems in air- and ground-based tactical, test and training platforms. An optional fan-cooled heat sink assembly is also available to provide cooling to the module.