ST2 DIAC – 35V Switch-On Trigger Device | Jaycar

You need a clean, repeatable trigger pulse for your TRIAC and a resistor divider isn't giving you the consistency you want. The ST2 DIAC snaps into conduction at a defined switch-on voltage of 35V, giving your gate circuit a sharp, reliable firing signal. Two terminals — no gate lead to route. Solder it in next to your TRIAC and your triggering is sorted

• 35V switch-on voltage (VSW) for consistent TRIAC triggering
• 3.5V critical breakover voltage (VCO)
• Nominal current (In) of 5mA, max forward current (IFmax) of 2mA
• Two-terminal bidirectional trigger device
• ST2 type designation for easy cross-reference