This part is a kind of semiconductor called BTA12-800CW3G.
Function of this product has Triacs.
Manufacturers : Littelfuse
Image and pinout :
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BTA12-600CW3G, BTA12-800CW3G Triacs Silicon Bidirectional Thyristors Designed for high performance full-wave ac control applications where high noise immunity and high commutating di/dt are required. Features • Blocking Voltage to 800 V • On-State Current Rating of 12 A RMS at 25°C • Uniform Gate Trigger Currents in Three Quadrants • High Immunity to dV/dt − 1500 V/ms minimum at 125°C • Minimizes Snubber Networks for Protection • Industry Standard TO-220AB Package • High Commutating dI/dt − 1.5 A/ms minimum at 125°C • Internally Isolated (2500 VRMS) • These Devices are Pb−Free and are RoHS Compliant MAXIMUM RATINGS (TJ = 25°C unless otherwise noted) Rating Symbol Value Unit Peak Repetitive Off−State Voltage (Note 1) (TJ = −40 to 125°C, Sine Wave, 50 [ ... ]