This part is a kind of semiconductor called 1803DHI.

Function of this product has ST1803DHI.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

® ST1803DHI HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTOR NEW SERIES, ENHANCHED PERFORMANCE s FULLY INSULATED PACKAGE FOR EASY MOUNTING s INTEGRATED FREE WHEELING DIODE s HIGH VOLTAGE CAPABILITY s HIGH SWITCHING SPEED s TIGTHER hfe CONTROL s IMPROVED RUGGEDNESS s 3 2 1 APPLICATIONS: s HORIZONTAL DEFLECTION FOR COLOR TV DESCRIPTION The ST1803DHI is manufactured using Diffused Collector technology for more stable operation Vs base drive circuit variations resulting in very low worst case dissipation. ISOWATT218 INTERNAL SCHEMATIC DIAGRAM RBE =25 Ω T yp. ABSOLUTE MAXIMUM RATINGS Symbol V CBO V CEO V EBO IC I CM IB P t ot T stg Tj Parameter Collector-Base Voltage (IE = 0) Collector-Emitter Voltage (I B = 0) Emitt er-Base Voltage (I C = 0) Collector Current Col [ ... ]

1803DHI PDF Datasheet Download