2n5945.pdf datasheet:

2N5945 NPN SILICON RF POWER TRANSISTOR DESCRIPTION: The ASI 2N5945 is Designed for FM Land Mobile Applications in the PACKAGE STYLE .280 4L STUD 400 to 960 MHz. A 45FEATURES:C Common Emitter B E E PG = 9.0 dB at 2.0 W/470 MHz B Omnigold Metalization System C D JE IMAXIMUM RATINGS FGIC 0.8 A H#8-32 UNCKVCBO 36 V MINIMUM MAXIMUMDIMinches / mm inches / mm1.010 / 25.65A 1.055 / 26.80VCEO 16 V .220 / 5.59 .230 /5.84B .270 / 6.86 .285 / 7.24C VEBO 4.0 V .003 / 0.08 .007 / 0.18D.117 / 2.97 .137 / 3.48EPDISS 15 W @ TC = 25 C .572 / 14.53F.130 / 3.30G.245 / 6.22 .255 / 6.48HTJ -65 C to +200 C .640 / 16.26I.175 / 4.45 .217 / 5.51JTSTG -65 C to +150 C .275 / 6.99 .285 / 7.24K11.6 C/W JC CHARACTERISTICS TC = 25 C SYMBOL NONETEST