# ANSI/IEEE relay coil with rc suppression symbol

Canonical URL: https://eloragrid.ai/symbols/ansi-relay-coil-with-rc-suppression
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: K RC
Drawing use: Schematic
Reference families: IEEE / ANSI, Manufacturer

## Symbol convention

Convention: IEEE / ANSI
Form: Autodesk IEEE-oriented Relays with Suppression functional form
Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.
Related representation: [Relay coil with RC suppression](https://eloragrid.ai/symbols/relay-coil-with-rc-suppression)

IEEE-oriented graphical reference for relay coil with rc suppression, with public vendor evidence and drawing-reading notes.

## What it represents

The RC-suppressed relay form associates resistance and capacitance with the operating circuit. Its actual network location and compatibility come from the selected assembly, while the contact circuit remains separately referenced.
This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic.

## How to read it

- Determine whether suppression is in the coil, socket or external wiring.
- Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code.

## Information to show or reference

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

## Important distinction

An RC network and a diode suppressor are different component arrangements, not interchangeable graphic decorations.

## Facts

- Convention evidence: Autodesk IEEE Symbol Preview — Relays with Suppression
- Public vendor block name: HCR1K39 (Autodesk identifier; not an IEEE symbol number)
- Standards context: IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved.
- Artwork scope: Original functional illustration; exact standard glyph and compliance are not certified

## Public references

- [Autodesk IEEE Symbol Preview — Relays with Suppression](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-538B6A25-1215-4F1B-A824-0181D01BE721.htm) — Autodesk. Exact public IEEE-oriented category page verifying the component name and vendor block identifier.
- [IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams](https://standards.ieee.org/ieee/315/515/) — IEEE Standards Association. Graphic-symbol standards context and official status; not a source of reproduced artwork.

## 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.