The T0405NU-R-A from Sino-Microelectronics is a Triac with Breakover Voltage -600 to 600 V, Breakover Current 30 to 31 A, Gate Trigger Voltage 0.7 to 1.3 V, Gate Trigger Current 5 mA, Temperature Operating Range -40 to 150 Degree C. Tags: Surface Mount. More details for T0405NU-R-A can be seen below.