TYN612 Standard 12A Silicon Controlled Rectifier SCR TO-220AB

The standard 12 A SCR series is suitable to fit all modes of control, found in applications such as overvoltage crowbar protection, motor control circuits in power tools and kitchen aids, inrush current limiting circuits, capacitive discharge ignition and voltage regulation circuits. Available in through-hole or surface-mount packages, they provide an optimized performance in a limited space

IGT 15mA

VDRM 600V

IT(rms)  12A

IT(AV) 8A

See datasheet for full details

https://www.st.com/resource/en/datasheet/tn1215.pdf