Coil
Relay coil
The operating element associated with a relay and its separately drawn contacts.
Schematic
Symbols · K DIODE
Relay coil with diode suppression
A relay with diode suppression includes a diode associated with its coil to limit the transient on de-energisation.
Schematic · K DIODE
What it represents
A relay with diode suppression includes a diode associated with its coil to limit the transient on de-energisation. The diode's documented connection makes control polarity important.
How to read it
- Verify the coil and diode polarity using the chosen relay or socket diagram.
- 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
- Mark coil polarity
- Identify integrated suppression
- Reference release-time behaviour
A distinction that matters
A suppression diode protects the control circuit; it is not a contact-side arc suppressor.
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: Relay suppression components
Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.
Relays and contacts: public symbol reference
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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