The MCR100-8 100-8 with SOT-23 TRIACs ROHS is a type of semiconductor device manufactured by Hong Kong-based Chuangji. It is a small three-legged, surface-mounted switch that is designed to control the flow of electrical current in an AC circuit. The SOT-23 TRIAC RoHS version of the MCR100-8 has a maximum current capacity of 800 mA, a maximum operating temperature of 125°C, and a minimum breakdown voltage of 1000 V. The package includes a free-wheeling diode and an integrated gate thyristor, both of which are needed to ensure proper operation. The device is RoHS compliant and can be used in a variety of applications, including industrial automation, HVAC, lighting, motor control, and more.