The Rohm Semiconductor RHD20-02 is a TV horizontal output transistor. This transistor is specifically designed to drive the horizontal deflection coil in CRT (Cathode Ray Tube) televisions and monitors. Its primary function is to rapidly switch current through the horizontal deflection coil, creating the magnetic field necessary to scan the electron beam across the screen, forming the image.

Applications

• CRT televisions.
• CRT monitors.

Features

• High voltage capability.
• Fast switching speed.
• High current capability.
• Integrated damper diode.

Benefits

• Reliable horizontal deflection in CRT displays.
• Efficient switching performance.
• Protection against voltage spikes due to the integrated damper diode.
• Stable and clear image reproduction.

Additional Details

The RHD20-02 is typically packaged in a TO-220 or similar package for efficient heat dissipation. Key specifications include a high collector-emitter breakdown voltage (Vceo), typically in the range of 1500V or higher, to withstand the high voltages generated in the horizontal deflection circuit. The collector current (Ic) rating is also substantial, typically several amperes, to handle the large currents required for horizontal deflection. The switching speed is critical for achieving a sharp and stable image, and the transistor is designed to minimize switching losses. The integrated damper diode protects the transistor from voltage spikes that can occur during the switching process. This component is a crucial element in older CRT technology and is responsible for generating the horizontal sweep necessary to display images.

Its high voltage and current capabilities are critical for handling the demands of CRT horizontal deflection circuits. The fast switching speed and integrated damper diode ensure reliable and efficient operation. Although CRT technology is largely obsolete, this component remains relevant for maintaining and repairing older CRT televisions and monitors.