Diac Db2 Datasheet Pdf 14 Top Jun 2026

The primary function of a DB2 DIAC is to serve as a high-speed trigger device. It remains in a highly resistive, non-conducting "off" state until the voltage across its two terminals reaches a critical threshold known as the Breakover Voltage ( VBOcap V sub cap B cap O end-sub

: Provides precise timing for phase-cut power control in small motors.

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. diac db2 datasheet pdf 14 top

The serves as a critical bidirectional trigger component designed primarily for power control systems, phase-angle triggering, and AC voltage modulation. Engineers frequently cross-reference the DB2 DIAC technical specifications to secure stable pulse generation when driving power thyristors and TRIACs.

(Output Voltage): The voltage across the DIAC during conduction ( The primary function of a DB2 DIAC is

The DB2 series is optimized for high-speed switching and pulse generation in:

+------------- AC Line -------------+ | | [Load] [Resistor] | | +-------[Main Terminal 2] +---[Capacitor]---+ | (MT2) | | [TRIAC] [DB2 DIAC] | | | | +-------[Gate]----------------------+ | | | +-------[Main Terminal 1]-----------------------------+ (MT1) 14 Top Technical Specifications in the DB2 Datasheet DB2 DIAC datasheets A DIAC is a bidirectional trigger diode

AC Mains | LOAD | / \ DIAC DB2 / \ | | |--------●----- G | | | ----- TRIAC | (e.g., BT136) C R | (R/C snubber) A2 | | Neutral -----------

When accessing a DB2/DB3 DIAC datasheet , you will typically find the following sections:

| Dimension | Min | Max | Unit | |-----------|-----|-----|------| | Body Length | 3.9 | 4.5 | mm | | Body Diameter | 1.8 | 2.2 | mm | | Lead Length | 25 | 30 | mm | | Lead Diameter | 0.45 | 0.55 | mm |

This is by far the most common application. In a standard light dimmer, a DIAC is used to trigger a TRIAC. An RC network determines the phase angle at which the DIAC fires, which in turn controls how much of the AC cycle is delivered to the lamp, effectively dimming it. The DIAC ensures a sharp, consistent gate pulse to the TRIAC for smooth, flicker-free dimming.