This part is a kind of semiconductor called BTA16.

Function of this product has Logic level and standard Triacs.

Manufacturers : ST Microelectronics

Image and pinout :

Some of the text within the PDF file :

BTA16, BTB16 T1610, T1635 16 A Snubberless™, logic level and standard Triacs Features ■ Medium current Triac ■ Low thermal resistance with clip bonding ■ Low thermal resistance insulation ceramic for insulated BTA ■ High commutation (4Q) or very high commutation (3Q) capability ■ BTA series UL1557 certified (File ref: 81734) ■ RoHS ( 2002/95/EC) compliant ■ Insulated tab (BTA series, rated at 2500 VRMS) Applications ■ Snubberless versions (BTA/BTB...W and T1635) especially recommended for use on inductive loads, because of their high commutation performances ■ On/off or phase angle function in applications such as static relays, light dimmers and appliance motor speed controllers A2 G A1 A2 A1 A2 G D2PAK T1610G T1635G A2 A1 A2 G TO-220AB insulated BTA16 A1 A2 G TO- [ ... ]

BTA16 PDF Datasheet Download