R
Resistor
A resistive component with its value and purpose documented separately.
Schematic
Symbols · DIAC
DIAC
A DIAC is a bidirectional triggering semiconductor device used in a documented control circuit.
Schematic · DIAC
What it represents
A DIAC is a bidirectional triggering semiconductor device used in a documented control circuit. Its terminals and breakover characteristics are defined by the selected component.
How to read it
- Follow the trigger circuit rather than treating the device as a controlled switch with a separate gate.
- The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation.
Information to show or reference
- Identify connected terminals
- Reference breakover rating
- Show associated trigger network
A distinction that matters
A DIAC does not have the same controlled gate terminal as a TRIAC.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
AutoCAD Electrical: Semiconductor components
Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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