Diac Db2 Datasheet Pdf 14: Top

This is the most important specification. It is the voltage at which the DIAC switches from OFF to ON. For a DB2, this voltage is designed to be in the . Once this voltage across MT1 and MT2 is exceeded, the device fires, providing a trigger pulse.

| Parameter | Symbol | Value | Unit | Conditions | |-----------|--------|-------|------|-------------| | | V_BO | 28 – 36 | V | I_BO = 50 µA typical | | Breakover Current | I_BO | 50 – 200 | µA | | | Switching Voltage Symmetry | ΔV_BO | ±3 | V | V_BO positive vs negative | | Peak Output Current | I_PK | 2 | A | t_p = 10 µs | | On-State Voltage | V_AK | ≈ 5 – 8 | V | at I_PK | | Leakage Current | I_R | < 10 | µA | at 0.8 V_BO | | Junction Temperature | T_J | -40 to +125 | °C | |

The DB2 is a bidirectional trigger diode, often housed in a DO-35 package, designed for low-cost thyristor triggering in AC phase-control applications like dimmers. It features a symmetrical breakover voltage, typically around 32V, and a repetitive peak on-state current of 2.0 A. For technical details on related DIAC models, see the STMicroelectronics DB3 Datasheet STMicroelectronics Datasheet - DB3, DB4, SMDB3 - Diac - STMicroelectronics

Without that specific 14th page specification—the —modern light dimmers wouldn't exist. We would still be controlling lights with giant, hot, mechanical rheostats. diac db2 datasheet pdf 14 top

In the early days of AC power control, engineers had a problem. They had —devices that could turn on massive amounts of power to run motors and dim lights—but they couldn't figure out how to wake them up reliably.

: When you download the PDF, search inside the document for "VBO" and "32V". If the document does not list the 14 parameters above, it is either an incomplete translation or a counterfeit datasheet.

: The voltage reaches the specific DB2 threshold (typically between 25V and 30V ). This is the most important specification

To serve that search intent, here are the you should look for in any DB2‑compatible datasheet:

Leaded Plastic Packages Chips/Dice for Diodes 2 DO-35 50 KBPC 60 Chips/Dice for Transistors 2 DO-41 50 KBPC-6 60 Products for CFL/ DatasheetArchive DIAC DB2 - The Datasheet Archive

: Do you have a specific DB2 circuit question? Or have you encountered a mismatch between your DB2 datasheet and the actual component? Leave a comment below (or contact your distributor’s FAE) to resolve VBO symmetry issues or thermal drift. Once this voltage across MT1 and MT2 is

) is reached. Once triggered, it exhibits a unique negative resistance region, causing the voltage across it to drop sharply while current surges.

Sources: DB3 datasheet references; DIAC characteristic analysis.

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