The is a bidirectional trigger diode designed primarily for phase control applications, such as lamp dimming and motor speed regulation. Often packaged in a hermetically sealed glass DO-35 case, it provides a stable and symmetrical trigger pulse for thyristors like TRIACs. Key Specifications and Features
Standard axial lead DO-35 glass package for through-hole mounting. Operational Characteristics
Approximately 150mW at an ambient temperature of 50∘C50 raised to the composed with power cap C 65∘C65 raised to the composed with power cap C Operating Temperature Range: Functional between -40∘Cnegative 40 raised to the composed with power cap C Diac Db2 Datasheet Pdf 14
Typically within 3V , ensuring the DIAC fires at nearly identical voltage levels in both positive and negative AC half-cycles. Repetitive Peak On-State Current ( ITRMcap I sub cap T cap R cap M end-sub ): Supports up to 2.0A for short pulses (e.g., at 120Hz).
Technical details for the DB2 series typically align with standard trigger diacs, focusing on breakover voltage and peak current. Breakover Voltage ( VBOcap V sub cap B cap O end-sub The is a bidirectional trigger diode designed primarily
): Ranges from , with a typical value of approximately 32V.
+110∘Cpositive 110 raised to the composed with power cap C . Breakover Voltage ( VBOcap V sub cap B
The DB2 behaves like a "transistor without a base". It remains in a non-conductive state until the applied voltage exceeds its specific breakover threshold. Once triggered, its resistance drops sharply (negative resistance characteristic), allowing a pulse of current to flow to the gate of a TRIAC. Datasheet - DB3, DB4, SMDB3 - Diac - STMicroelectronics