This part is a kind of semiconductor called TDA2004A.
Function of this product has 10 10W STEREO AMPLIFIER FOR CAR RADIO.
Manufacturers : ST Microelectronics
Image and pinout :

Some of the text within the PDF file :
TDA2004A 10 + 10W STEREO AMPLIFIER FOR CAR RADIO Its main features are : Low distortion. Low noise. High reliability of the chip and of the package with additional safety during operation thanks to protections against : OUTPUT AC SHORT CIRCUIT TO GROUND VERY INDUCTIVE LOADS OVERRATING CHIP TEMPERATURE LOAD DUMP VOLTAGE SURGE FORTUITOUS OPEN GROUND Space and cost saving : very low number of external components, very simple mounting system with no electrical isolation between the package and the heatsink. . . . . . MULTIWATT11 ORDERING NUMBER : TDA2004A DESCRIPTION The TDA2004A is a class B dual audio power amplifier in MULTIWATT® package specifically desi- gned for car radio applications ; stereoamplifiers are easily designed using this device that provides a high current capability (u [ ... ]
TDA2004A PDF Datasheet Download
