Diac Db2 Datasheet Pdf 14 Top Exclusive Jun 2026

Whether you're designing a dimmer switch, troubleshooting a power control circuit, or selecting components for a new project, this guide will provide you with all the essential information.

The maximum repetitive peak current the DIAC can handle during a brief transient discharge (typically measured at a pulse width of

A . This guarantees that very little leakage current passes through the circuit until the precise triggering point is met. Excellent voltage symmetry, usually within ±plus or minus ±plus or minus

A DIAC (Diode for Alternating Current) behaves similarly to a bidirectional neon lamp, triggering conduction only after its threshold limits are crossed. Below are the primary parameters extracted from official technical documentation like the STMicroelectronics DIAC Datasheet to help you accurately size your components: 1. Breakover Voltage ( VBOcap V sub cap B cap O end-sub

Triggering the starter circuit. 5. Summary Table: DB2/DB3 Characteristics Typical Value Breakover Voltage VBOcap V sub cap B cap O end-sub Peak Pulse Current ITRMcap I sub cap T cap R cap M end-sub Symmetry Operating Temp Tjcap T sub j -40 to +125°C Conclusion diac db2 datasheet pdf 14 top

) : Typically ranges between , serving as a highly stable, fixed voltage reference. Breakover Current ( IBOcap I sub cap B cap O end-sub

3V —prevents DC offsets and asymmetric firing in AC waveforms, ensuring smooth operation in dimmers and motor drivers. Dynamic Breakover Voltage (

Adjusting the conduction angle of the TRIAC to regulate power to the motor.

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The nominal voltage at which the device switches from blocking state to conduction. For the DB2 family, this value generally sits in the (typically around 32V), aligning closely with related trigger components like the STMicroelectronics TMMDB3 Series . Breakover Voltage Symmetry (

Before diving into the datasheet specifics, let’s establish a baseline. A DIAC is a bidirectional trigger diode. Unlike a standard diode, it conducts current only after its (VBO) is exceeded in either direction. Once triggered, it exhibits negative resistance, dropping the voltage across it and allowing a surge of current to fire a TRIAC gate.

The DB2 DIAC acts as a switch. In a standard dimmer circuit:

A DIAC acts as a bidirectional switch that conducts current only after its breakover voltage ( cap V sub cap B cap O end-sub is reached. RS Components Replacement is the industry standard substitute for the DB2. Excellent voltage symmetry, usually within ±plus or minus

| Parameter | Value / Range | | --------------------- | ------------------------------------ | | | Bidirectional trigger diode (DIAC) | | Full name | Diode for Alternating Current (DB2) | | Breakover voltage (VBO) | Typically 28 V – 36 V (similar to DB3) | | Peak current | Up to 2 A (surge) | | Case style | DO-35 (glass axial lead) | | Operating temp. | –40 °C to +100 °C | | Typical application | AC dimmer, triac trigger, relaxation oscillator |

Understanding the DIAC DB2: Datasheet Analysis, Core Metrics, and Top 14 Circuit Applications

The DB2 is a standard electronic component, but availability may vary. Here is a practical guide for sourcing and substitution.