(Pack of 10) DB3 DIAC Trigger Mode Diode

(Pack of 10) DB3 DIAC Trigger Mode Diode

The DB3 DIAC is a bidirectional trigger diode used primarily to provide a consistent and symmetrical breakdown characteristic in AC control circuits. It remains in a high-impedance, non-conducting state until the applied voltage reaches its breakdown threshold (typically around 30 V), at which point it switches to a low-impedance conducting state in either polarity.
This behavior makes the DB3 ideal for triggering TRIACs and other AC switching devices at a predictable voltage point. The pack of 5 ensures you have multiple units for experiments, repairs, or production needs.

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Features

• Bidirectional triggering — conducts in both directions after breakdown
• Breakover voltage around ~30 V — consistent trigger point
• High switching speed for reliable triggering
• Compact diode package — easy to integrate on PCBs
• Stable characteristics for repeatable performance
• Pack of 5 units — great value for projects and spares

Applications

• TRIAC gate triggering in AC power control circuits
• Phase control circuits for light dimmers and motor speed controllers
• Solid-state relays
• AC control modules in home appliances
• Waveform shaping and triggering networks