Coil
Relay coil
The operating element associated with a relay and its separately drawn contacts.
Schematic
Symbols · K LATCH
Mechanically latched relay coil
A mechanically latched relay retains a documented state after the initiating electrical command is removed.
Schematic · K LATCH
What it represents
A mechanically latched relay retains a documented state after the initiating electrical command is removed. The schematic needs both the operating and reset mechanism so the retained state can be understood.
How to read it
- Identify the reset or unlatching path instead of assuming removal of coil power releases the contacts.
- 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 operating coil
- Show reset or unlatch action
- Cross-reference retained contacts
A distinction that matters
A latched relay retains state; a conventional monostable relay returns when its operating condition is removed.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
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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