78L12G 78L12G SOT-89 T/R 78L12G TO-92 78L12G(W1) 78L12G-AB3 78L12GAB3R 78L12G-AB3-R 78L12G-AB3-R TEL:88834448 78L12G-AB3-R 三端稳压管(器) 78L12G-S08-R