Bi-directional trigger diode,the breakover symmetry is within 3V(DB3,DB4,DC34),or 4V(DB6). Package: DO-35 glass package Silicon Bidirectional Diac Diac Diode:DB3:28V-36V DC34:30V-34VDB4:35V-45VDB6:56V-70VPackage: DO-35,DO-41Mainly used on energy saving lighting or electronic ballast Silicon Bidirectional Diac : DB3,DB4,DB6,DC34,