This part is a kind of semiconductor called 1897.

Function of this product has RF & MICROWAVE TRANSISTORS 1.65 GHz SATCOM APPLICATIONS.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

SD1897 RF & MICROWAVE TRANSISTORS 1.65 GHz SATCOM APPLICATIONS . . . . . 1.65 GHz 28 VOLTS CLASS C OPERATION COMMON BASE P OUT = 10 W MIN. WITH 11.0 dB GAIN .250 x .320 2LFL (M170) epoxy sealed ORDER CODE SD1897 BRANDING 1897 PIN CONNECTION DESCRIPTION The SD1897 is a 28 V Class C silicon NPN transistor designed for INMARSAT and other 1.65 GHz SATCOM applications. A gold metallized emitterballasted die geometry is employed providing high gain and efficiency while ensuring long term reliability and ruggedness under severe operating conditions. SD1897 is packaged in a cost-effective epoxy sealed housing. ABSOLUTE MAXIMUM RATINGS (T case = 25 ° C) Symbol Parameter Value Unit 1. Collector 2. Emitter 3. Base VCBO VCEO VEBO IC PDISS TJ T STG Collector-Base Voltage Collector-Emitter Volt [ ... ]

1897 PDF Datasheet Download