This post explains for the semiconductor 1803DFX.
The Full Part Number is MD1803DFX. The package is ISOWATT218FX.
The function of this semiconductor is High voltage NPN Power Transistor.
The manufacturers of this product is STMicroelectronics.
See the preview image and the PDF file for more information.
Preview images :
The MD1803DFX is manufactured using Diffused Collector in Planar Technology adopting new and enhanced high voltage structure. The new MD product series show improved silicon efficiency bringing updated performance to the Horizontal Deflection stage.
■ State-of-the-art technology:
– Diffused collector “enhanced generation”
■ More stable performance versus operating temperature variation
■ Low base drive requirement
■ Tighter hFE range at operating collector current
■ Fully insulated power package U.L. compliant
■ Integrated free wheeling diode
■ In compliance with the 2002/93/EC european directive