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The MS1280 from Microsemi is a RF Transistor with Frequency 225 MHz, Gain 7.5 dB, Power 20 W, Supply Voltage 28 V, Current 3.5 mA. More details for MS1280 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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