The MCR100L-6-AB3-R from Unisonic Technologies is a Silicon Controlled Rectifier with Breakover Voltage 400 V, Breakover Current 10 A, Gate Trigger Voltage 0.8 to 1.2 V, Gate Trigger Current 30 to 100 uA, Temperature Operating Range -40 to 110 Degree C. Tags: Surface Mount. More details for MCR100L-6-AB3-R can be seen below.