# Maintained normally-closed pushbutton

Canonical URL: https://eloragrid.ai/symbols/maintained-normally-closed-pushbutton
Publisher: Elora Grid
Updated: 2026-10-13
Lookup label: PB NC HOLD
Drawing use: Schematic
Reference families: IEC, Manufacturer

A maintained NC pushbutton retains its actuated open state until the documented return action.

## What it represents

A maintained NC pushbutton retains its actuated open state until the documented return action. This affects permissive and stopping circuits that depend on contact continuity.

## How to read it

- Determine how the operator returns to the reference position.
- 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 retained state
- Show contact terminal numbers
- Reference return mechanism

## Important distinction

Maintained NC operation does not alone establish an emergency-stop safety function.

## Facts

- Drawing role: Manual operation
- Representation scope: Functional concept; not an official standard graphic or a product footprint
- Public vendor block reference: HPB12S76, VPB12S76 (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: Illuminated push buttons](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7B13B543-97A4-4A7E-8D08-49386A153A33.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.