View 2sd1391 datasheet:

SD1391 RF & MICROWAVE TRANSISTORS UHF BASE STATION APPLICATIONS P RELIMINARY DATA .470 MHZ .24 VOLTS .EFFICIENCY 50% MIN. .POUT 15 W WITH 11.0 dB MIN. GAIN = .CLASS AB .COMMON EMITTER .2 30 x .3 60 6LF L (M14 2) ORDE R CODE BRANDING SD1391 SD1391 PIN CONNECTION DESCRIPTION The SD1391 is a gold metallized NPN planar tran- sistor using diffused emitter ballast resistors for reliability and ruggedness. The SD1391 is specifically designed as a low power, high gain driver and can be operated in 1. Collector 3. Emitter Class A, B or C. 2. Base ABSOLUTE MAXIMUM RATINGS (T = 25°C) case Symbol Parameter Value Unit VCBO Collector-Base Voltage 48 V V Collector-Emitter Voltage 25 V CEO VEBO Emitter-Base Voltage 3.5 V IC Collector Current 2.5 A P Power Dissipation (+25°C)