DIAC
DIAC
A DIAC is a bidirectional triggering semiconductor device used in a documented control circuit.
Schematic
IEEE / ANSI · DIAC
ANSI/IEEE DIAC form
IEEE-library form of diac: a DIAC is a bidirectional triggering semiconductor device used in a documented control circuit.
In plain English
What does ANSI/IEEE DIAC form mean?
This reference locates diac in Autodesk's IEEE-oriented semiconductor components family. 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. The public library uses HDI1V3 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.
A simple example
Follow the actual current path and terminal polarity in the surrounding circuit. The symbol identifies an electrical function; voltage, current, energy limits and the device package pinout come from the selected component data rather than from the outline.
What the drawings help you do
Follow the trigger circuit rather than treating the device as a controlled switch with a separate gate. A DIAC does not have the same controlled gate terminal as a TRIAC. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted.
This particular reference
IEEE-library form of diac: a DIAC is a bidirectional triggering semiconductor device used in a documented control circuit. A DIAC does not have the same controlled gate terminal as a TRIAC.
- Terminal
- An identified point where a conductor connects.
- Rating
- A value stating the conditions for which equipment is specified.
- Schematic
- A drawing showing function and connections rather than physical appearance.
Read the source: Autodesk IEEE Symbol Preview — Semiconductor Components
IEEE / ANSI · Diac Diode - Two Way
Autodesk IEEE Symbol Preview: Semiconductor Components, block HDI1V3. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
Schematic · DIAC
What it represents
This reference locates diac in Autodesk's IEEE-oriented semiconductor components family. 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. The public library uses HDI1V3 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.
Follow the actual current path and terminal polarity in the surrounding circuit. The symbol identifies an electrical function; voltage, current, energy limits and the device package pinout come from the selected component data rather than from the outline.
Follow the trigger circuit rather than treating the device as a controlled switch with a separate gate. A DIAC does not have the same controlled gate terminal as a TRIAC. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted.
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.
Autodesk IEEE Symbol Preview — Semiconductor Components
Public IEEE-oriented Semiconductor Components table explicitly lists HDI1V3 as Diac Diode - Two Way. This supports the vendor convention context, not reproduction of the publisher 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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