This part is a kind of semiconductor called BTA16-600C.
Function of this product has Triacs.
Manufacturers : Inchange Semiconductor
Image and pinout :
Some of the text within the PDF file :
INCHANGE Semiconductor isc Triacs isc Product Specification BTA16-600C FEATURES ·With TO-220AB insulated package ·Suitables for general purpose AC switching. Which can be used as an ON/OFF function in applications such as static relays, heating regulation, induction motor starting circuits. Or for phase control operation in light dimmers, motor speed controllers etc. ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL PARAMETER VDRM VRRM IT(RMS) ITSM Tj Tstg Rth(j-c) Rth(j-a) Repetitive peak off-state voltage Repetitive peak reverse voltage RMS on-state current (full sine wave)Tj=85℃ Non-repetitive peak on-state current tp=20ms Operating junction temperature Storage temperature Thermal resistance, junction to case Thermal resistance, junction to ambient MIN UNIT 600 V 600 V 16 A 160 A 11 [ ... ]