mrf5003.pdf datasheet:

MOTOROLAOrder this documentSEMICONDUCTOR TECHNICAL DATAby MRF5003/DThe RF MOSFET LineRF Power Field Effect TransistorNChannel EnhancementMode MRF5003The MRF5003 is designed for broadband commercial and industrialapplications at frequencies to 520 MHz. The high gain and broadbandperformance of this device makes it ideal for largesignal, common sourceamplifier applications in 7.5 Volt and 12.5 Volt mobile, portable, and basestation FM equipment.3.0 W, 7.5 V, 512 MHz Guaranteed Performance at 512 MHz, 7.5 VoltsNCHANNELOutput Power = 3.0 Watts BROADBANDRF POWER FETPower Gain = 9.5 dBEfficiency = 45% Characterized with Series Equivalent LargeSignal Impedance Parameters SParameter Characterization at High Bias Levels Excellent Thermal Stability All Gold Metal for Ultra Reliability Capable of Handling 20:1 VSWR