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The 10A015 from Microsemi is a RF Transistor with Frequency 1000 MHz, Gain 9.5 dB, Power 1.5 W, Input Power 0.2 W, Supply Voltage 20 V. More details for 10A015 can be seen below.
1805 to 1880 MHz, 89 W Airfast RF Power LDMOS Transistor
4500 to 5900 MHz GaN HEMT for C-Band Radar Systems
GaN HEMT Transistor 1.2 to 1.4 GHz
You can now find similar products from multiple companies on everything RF.