The BT151 TO-252 TRIAC from Weida Semiconductor is a silicon controlled rectifier designed for use in medium-power, AC switching applications. The device is a single-phase, two-terminal, bidirectional thyristor capable of controlling current from 40 to 800 Amps RMS. The BT151 is housed in a TO-252 package, which is RoHS compliant, allowing the device to be soldered with lead-free solder. The BT151 has a temperature range of -55? to 175?, and it features glass passivation, ensuring reliable operation in high temperature, low power applications. Its maximum holding current is 10mA, allowing for improved performance in low level switching applications. Additionally, the device has an SRI value of >50 which ensures reliable low level gate current switching. This makes it ideal for applications that require fast switching and low power consumption.