# Mechanically latched relay coil

Canonical URL: https://eloragrid.ai/symbols/mechanically-latched-relay-coil
Publisher: Elora Grid
Updated: 2026-10-13
Lookup label: K LATCH
Drawing use: Schematic
Reference families: IEC, Manufacturer

A mechanically latched relay retains a documented state after the initiating electrical command is removed.

## 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

## Important distinction

A latched relay retains state; a conventional monostable relay returns when its operating condition is removed.

## Facts

- Drawing role: Relay operation
- Representation scope: Functional concept; not an official standard graphic or a product footprint
- Public vendor block reference: HLR1, VLR1 (Autodesk identifiers; not IEC symbol numbers)
- Identifier status: The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name.

## Public references

- [Relays and contacts: public symbol reference](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-011C62B8-9EC8-485C-B47D-B22A3F7B7574.htm) — Autodesk. Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.