# ANSI/IEEE capacitor symbol

Canonical URL: https://eloragrid.ai/symbols/ansi-capacitor
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: C
Drawing use: SLD, Schematic
Reference families: IEEE / ANSI, Manufacturer

## Symbol convention

Convention: IEEE / ANSI
Form: Autodesk IEEE-oriented Capacitive Components 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: [Capacitor](https://eloragrid.ai/symbols/capacitor)

IEEE-oriented graphical reference for capacitor, with public vendor evidence and drawing-reading notes.

## What it represents

The capacitor form identifies a capacitive component between its circuit connections. Its value and voltage rating are read from the component annotation, and the circuit placement establishes whether its role is filtering, coupling or another documented function.
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

- The two plates represent a function, not a physical spacing dimension.
- 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

- State capacitance/tolerance
- Record voltage rating
- Identify circuit purpose

## Important distinction

A generic capacitor form does not establish polarisation or an electrolytic construction.

## Facts

- Convention evidence: Autodesk IEEE Symbol Preview — Capacitive Components
- Public vendor block name: HCA1 (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 — Capacitive Components](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-0F8673C7-D786-441C-AB55-F2CDB8D5B288.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.