R
Resistor
A resistive component with its value and purpose documented separately.
Schematic
Symbols · SCR
Silicon-controlled rectifier
An SCR is a thyristor with a gate-controlled triggering function in its documented circuit.
Schematic · SCR
What it represents
An SCR is a thyristor with a gate-controlled triggering function in its documented circuit. Anode, cathode and gate connections must be distinguished to understand the control path.
How to read it
- Read turn-on and current-interruption behaviour from the chosen circuit and component.
- 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
- Label gate/anode/cathode
- Reference gate drive
- State voltage/current ratings
A distinction that matters
An SCR is not the same as a bidirectional 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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