# Relay coil with RC suppression

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

A relay RC suppression network uses resistance and capacitance associated with the coil circuit.

## What it represents

A relay RC suppression network uses resistance and capacitance associated with the coil circuit. It provides a documented transient-control function with characteristics distinct from diode suppression.

## How to read it

- Confirm whether the RC module is internal, in the socket or separately wired.
- 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

- Show network location
- State coil supply
- Reference compatible suppression unit

## Important distinction

RC suppression and diode suppression are not interchangeable annotations for every supply type.

## Facts

- Drawing role: Relay operation
- Representation scope: Functional concept; not an official standard graphic or a product footprint
- Public vendor block reference: HCR1K39, VCR1K39 (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

- [AutoCAD Electrical: Relay suppression components](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-AF7C83A4-33F4-4144-94BE-4C5F2F448FB8.htm) — Autodesk. 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](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.