View bta12s datasheet:

BTA12 SW BTB12 SW LOGIC LEVEL TRIACS FEATURES .LOW IGT =10mAmax .HIGH EFFICIENCY SWITCHING ON COMMU- TATION .BTA Family : INSULATING VOLTAGE = 2500V(RMS) (UL RECOGNIZED : E81734) A1 DESCRIPTION A2 G The BTA/BTB12 SW Triac family are high perform- ance products glass passivated PNPN devices. TO220AB These parts are suited for low power trigger circuit (Plastic) (integrated circuits, microcontroller, microproces- sors. ABSOLUTE RATINGS (limiting values) Symbol Parameter Value Unit IT(RMS) RMS on-state current BTA Tc = 70 °C12 A (360° conduction angle) BTB Tc = 75 °C ITSM Non repetitive surge peak on-state current tp = 8.3 ms 126 A ( Tj initial = 25°C) tp = 10 ms 120 I2t I2t value tp = 10 ms 72 A2s dI/dt Critical rate of rise of on-state current Repetitive 20 A/µ