This part is a kind of semiconductor called ACS102-5T1.

Function of this product has AC LINE SWITCH.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

® ACS102-5Tx AC LINE SWITCH ASD™ AC Switch Family MAIN APPLICATIONS AC on-off static switching in appliance & industrial control systems Drive of low power high inductive or resistive loads like - relay, valve, solenoid, dispenser - pump, fan, micro-motor - low power lamp bulb, door lock s s OUT FEATURES s s G COM s s s s s Blocking voltage : VDRM / VRRM = 500V Clamping voltage : VCL = 600 V Nominal current : IT(RMS) = 0.2 A Gate triggering current : IGT < 5 mA Switch integrated driver Triggering current is sourced by the gate SO-8 package: - drive reference COM connected to 2 cooling pins - 3.5 mm creepage distance from pin OUT to other pins TO-92 ACS102-5TA NC COM COM G NC OUT NC NC BENEFITS Needs no external overvoltage protection Enables equipment [ ... ]

ACS102-5T1 PDF Datasheet Download