The MRF6V14300H from NXP Semiconductors is a RF Transistor with Frequency 1200 to 1400 MHz, Gain 18 dB at 18 MHz, Power 330 W, P1dB 330 W, Supply Voltage 50 V. More details for MRF6V14300H can be seen below.
450 Watt, 50 Volt, 3.1 to 3.5 GHz, GaN RF IMFET
15 Watt, 50 Volt, DC to 4 GHz, GaN RF Transistor
15W, 300 MHz to 1.215 GHz, GaN RF Input-Matched Transistor
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