This part is a kind of semiconductor called STK433-030-E.

Function of this product has 2-Channel Class AB Audio Power IC.

Manufacturers : Sanyo

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Some of the text within the PDF file :

Ordering number : EN*A1247 Thick-Film Hybrid IC STK433-030-E Overview 2-channel class AB audio power IC, 30W+30W The STK433-030-E is a hybrid IC designed to be used in 30W × 30W (2-channel) class AB audio power amplifiers. Applications • Audio power amplifiers. Features • Pin-to-pin compatible outputs ranging from 30W to 60W. • Can be used to replace the STK433-200 series (3-channel) due to its pin compatibility. • Miniature package (47.0mm × 25.6mm × 9.0mm) • Output load impedance: RL = 6Ω to 4Ω supported • Allowable load shorted time: 0.3 second • Allows the use of predesigned applications for standby and mute circuits. Series Models STK433-030-E Output 1 (10%/1kHz) Output 2 (0.4%/20Hz to 20kHz) Max. rated VCC (quiescent) Max. rated VCC (6Ω [ ... ]

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