DIAC

Key Features

• Symmetrical Switching: Conducts in both directions with nearly identical breakover voltages for balanced AC control.
• Sharp Triggering Pulse: Provides a fast-rise current pulse ideal for firing TRIAC gates.
• High Stability: Maintains a consistent breakover voltage even after thousands of switching cycles.
• Low Leakage Current: Minimal power consumption when in the “Off” state.
• Compact Glass Packaging: Housed in the standard DO-35 package, perfect for space-constrained PCBs.

Technical Specifications  

Breakover Voltage                        28V – 36V (32V Nominal)

Breakover Voltage Symmetry    ±3V

Peak Output Current                   2.0 Amps

Breakover Current                        50 µA (Max)

Operating Temperature              -40°C to +125°C

Package Type                                 DO-35 (Axial Leaded Glass)

Max Power Dissipation               150mW

Common Applications

• TRIAC Triggering: Providing the gate pulse for light dimmers, fan speed controllers, and heat regulators.
• Fluorescent Lamp Starters: Used in the starting circuits of compact fluorescent lamps (CFLs).
• AC Phase Control: Helping to time the “on” period of an AC cycle for variable power delivery.
• Oscillator Circuits: Creating simple pulse generators for timing or signaling.
• Overvoltage Protection: Acting as a simple crowbar-style trigger in specialized protection circuits.