The MMRF5019N from NXP Semiconductors is a RF Transistor with Frequency 1 MHz to 3 GHz, Gain 18 dB @ 2500 MHz, Power 43 dBm, P1dB 44 dBm, Supply Voltage 50 V. More details for MMRF5019N 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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