The BT137-600E is a TRIAC (Triode for Alternating Current) manufactured by Weida Semiconductor. It has a TO-252 package, which is suitable for use on printed circuit boards. This TRIAC has an integrated gate resistor, which helps to reduce EMI (Electromagnetic Interference) and offers protection for the device. It has an RMS ( Root Mean Square) current rating of 600A and a breakdown voltage of 600V. It is also RoHS (Restriction of Hazardous Substances) compliant, making it suitable for use in a variety of applications. The BT137-600E is used in a vast array of applications, from power control to heating systems.