The MRF7S38040H from NXP Semiconductors is a RF Transistor with Frequency 3400 to 3800 MHz, Gain 14 dB at 14 MHz, Power 40 W, P1dB 40 W, Supply Voltage 30 V. More details for MRF7S38040H 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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