The 10PT series of silicon controlled rectifiers are high performance glass passivated technology, and are designed for power supply up to 400Hz on resistive or inductive load. A K A G TO-251 (I-PAK) (10PTxxF) A A A K G TO-252 (D-PAK) (10PTxxG) K A G K A G TO-220AB (Non-lnsulated) TO-220AB (lns.