The BTA41-800B is a 40A 3-terminal medium power TRIAC manufactured by Continental Device India Limited (CDIL). It is suitable for universal mains AC switching and can be used in a wide range of applications. It has a high blocking voltage of 800V, surge current rating of 140A, a noise immunity level of 15mA, and a typical gate current of 7mA. The BTA41-800B has a lead-free design and RoHS compliance, making it suitable for use in hazardous or polluted areas. It is suitable for use in low-voltage AC switching applications such as temperature controllers, motor speed controllers, lighting ballasts, and household appliances.