This part is a kind of semiconductor called BTB16-700BW.
Function of this product has 16A TRIACS.
Manufacturers : ST Microelectronics
Image and pinout :
Some of the text within the PDF file :
® BTA/BTB16 and T16 Series 16A TRIACS SNUBBERLESS™ , LOGIC LEVEL & STANDARD MAIN FEATURES: Symbol IT(RMS) VDRM/VRRM IGT (Q1) Value 16 600, 700 and 800 10 to 50 Unit A V G A2 A1 A2 mA A1 A2 G DESCRIPTION Available either in through-hole or surface-mount packages, the BTA/BTB16 and T16 triac series is suitable for general purpose AC switching. They 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, ... The snubberless versions (BTA/BTB...W and T16 series) are specially recommended for use on inductive loads, thanks to their high commutation performances. By using an internal ceramic pad, the BTA series provides voltage insulated t [ ... ]