It's DB3 28-36v diode for alternating current. The DIAC is a combination of two diodes in parallel, one is in forward bias and one is in reverse bias condition with respect to both sides. It has breakdown voltage 32v, breakdown current 100uA.
|Breakover Voltage (Vbo)||32V|
|Output Voltage (Vo)||5V|
|Repetitive Peak On-State Current (Itrm)||2.0A|
|Breakover Current (Ibo)||0.100mA|
|Total Power Dissipation (Ptot)||150mW|