This part is a kind of semiconductor called ADS1D80.

Function of this product has 4 Quadrants Triacs.

Manufacturers : ADV

Image and pinout :

Some of the text within the PDF file :

ADV ADS1D60/80 4 Quadrants Triacs General Description This device is suitable for low power AC switching application, phase control application such as fan speed and temperature modulation control , lighting control and static switching relay also designed for use in MPU interface, TTLlogic. Features ◆ Repetitive Peak Off-State Voltage: 600Vand800V ◆ R.M.S On-State Current ( IT(RMS)= 0.8 A ) ◆ These Devices are Pb-Free and are RoHS Compliant 2.T2 3.Gate 1.T1 1 32 TO-92 Absolute Maximum Ratings ( Tj = 25°C unless otherwise specified ) Symbol VDRM VRRM IT(RMS) ITSM I2t dI/dt IGM PG(AV) PGM Tj TSTG Items Repetitive Peak Off-State Voltage Tj = 25°C [ ... ]

ADS1D80 PDF Datasheet Download