This part is a kind of semiconductor called STK403-130.

Function of this product has 2 channels AF power amplifier.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

SPECIFICATION No. STK403-130 1. Case Outline 15Pins (See attached Package Outline Diagram) 2. Function 3. Application 2 channels AF power amplifier 100W audio use 2002.12.28 4. Maximum Ratings / Ta=25°C Item Maximum Power Supply Voltage 0 Maximum Power Supply Voltage Minimum Operation Supply Voltage #12 Maximum Operating Current *7 Thermal Resistance Junction Temperature Operating Substrate Temperature Storage Temperature Available Time for Load Short-circuit *4 5. Operating Characteristics Symbol Vcc max(0) Vcc max(1) Vcc min IST OFF max Theta j-c Tj max Tc max Tstg ts Conditions Non- signal Signal ,R L•† 6ohm e. co Ratings MIN. 96 TYP. 100 150 VG=30dB +0 -3 dB Rg=2.2kohm No load V#13=5V #13PIN Resistance R1=13kohm 20 -70 45 0 0.01 20 to 50k 55 0.25 Ratings +-71.5 +-63 +-10 0.6 [ ... ]

STK403-130 PDF Datasheet Download