2SA1943 2SC5200 Audio amplifier tube TO3PL Size: 2SC5200 Includes diodes to improve conversion rates Key benefits Direct replacement for 2SA1943 and 2SC5200 output transistors in TO3PL packaging, making repairs and upgrades straightforward. Integrated diodes help improve conversion rates in amplifier output stages, supporting more efficient signal transfer and reducing distortion risk from switching transitions. Robust TO3PL package provides stable mounting and effective heat conduction for reliable operation in power audio circuits. What this part does Functions as a power transistor pair for audio amplifier output stages, allowing amplification of audio signals to drive speakers or downstream stages. Diodes included with the assembly are intended to support correct biasing and improve conversion efficiency during signal transitions. Important attributes Models supported: 2SA1943 and 2SC5200 as specified. Size and package: 2SC5200 size in TO3PL package for compatibility with standard 2SC5200 footprints. Material and construction: TO3PL metalstyle package designed for thermal stability and secure mounting. Performance: Designed for power amplification roles in audio circuits with diodes to support improved conversion behavior. Compatibility Compatible with amplifier designs and replacement parts that accept 2SA1943 and 2SC5200 transistors in TO3PL format. Suitable for DIY audio amplifier projects, amplifier , and custom audio electronics where these transistor models are specified. Typical applications Home audio amplifier : worn or damaged output transistors on vintage or modern amplifiers that use 2SA1943 and 2SC5200 in TO3PL packaging. DIY amplifier builds: Use as the output stage transistors in custom amplifier designs that require reliable power handling and standard 2SC5200 footprint. Automotive or portable audio amplifier servicing: Install in compatible car audio or portable amplifier units where TO3PL packaged 2SA1943 and 2SC5200 transistors are specified. Notes Ensure correct polarity and thermal mounting when installing to maintain performance and longevity. Verify circuit compatibility with 2SA1943 and 2SC5200 specifications before installation.