) passes through the device. The DIAC acts as an open switch. Breakover Point ( VBOcap V sub cap B cap O end-sub
(Output Voltage): The voltage across the DIAC during conduction (
(Breakover Voltage) - Typical: The average voltage, usually around 30V-32V. VBOcap V sub cap B cap O end-sub
Last updated: October 2025 – Includes the latest RoHS and REACH compliance notes for DB2 DIACs. diac db2 datasheet pdf 14 top
| Symbol | Parameter | Min | Typ | Max | Unit | |---------|-------------------------------|-----|-----|-----|------| | VBO | Breakover voltage | 28 | 32 | 36 | V | | IBO | Breakover current | — | — | 200 | μA | | VF | On‑state voltage (at I = 1 A) | — | 1.5 | — | V | | VRM | Repetitive peak off‑state voltage | — | — | 32 | V | | dV/dt | Critical rate of rise of off‑state voltage | 5 | — | — | V/μs | | IH | Holding current | — | — | 50 | mA | | Tj | Operating junction temperature| –40 | — | 100 | °C | | Tstg | Storage temperature | –55 | — | 150 | °C |
, the device triggers into a negative resistance region, causing its internal resistance to drop sharply. This sudden shift permits a fast, high-amplitude current pulse to discharge, making it ideal for gating circuits. Because the device is fully bidirectional, it operates identically during both the positive and negative halves of the AC waveform. 2. Key Electrical Specifications and Datasheet Parameters
The keyword phrase “diac db2 datasheet pdf 14 top” suggests a user is looking for a PDF datasheet that includes – in other words, a datasheet that highlights the 14 most important electrical and mechanical specifications for the DB2. Alternatively, “14 top” might refer to an asymmetric DIAC with a 14 V breakover voltage in one direction (though that is more typical of the ST4, not DB2). ) passes through the device
If you are looking for specific or need a comparison with DB3/DB4 alternatives , I can provide those. Datasheet - DB3, DB4, SMDB3 - Diac - STMicroelectronics
While searching for "14" in relation to this datasheet, many engineers often cross-reference the pinout. If you are laying out a PCB, ensure you are referencing the DB2 pinout (usually a DO-35 or DO-41 glass package depending on the specific variant) and not confusing it with the DB3 (which has different breakover voltage specs).
): Capable of handling significant, short-duration current pulses (typically >2Ais greater than 2 cap A pulse) to trigger a Triac effectively. Rapid switching (often ) ensures the Triac turns on precisely. VBOcap V sub cap B cap O end-sub
: The DB3 is the closest match. The only difference is IBO (50 µA vs 200 µA for DB2). In many circuits, they are interchangeable.
For further detailed schematics and performance curves, you can view the STMicroelectronics DB3 Series Datasheet, which covers the electrical behavior shared by most DB2/DB3 components.