{"schemaVersion":1,"slug":"pushbutton-no","name":"Normally open pushbutton","kind":"symbol","abbreviation":"PB NO","aliases":["start pushbutton","NO push button","momentary make pushbutton","HPB11","VPB11"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A pushbutton contact normally shown open before actuation.","description":["A normally open pushbutton combines an operator-actuated mechanism with a contact shown open in its defined normal state. Momentary and maintained or latching operation are separate characteristics that must be described explicitly.","Control schematics should identify both the contact function and the operator-facing purpose. A start label is a circuit-specific use, not an intrinsic property of every NO pushbutton. Multiple contact blocks can belong to a single actuator."],"readingNotes":["Read the actuator description and contact-block association.","Check whether the operating mode is momentary, maintained or latching."],"drawingChecklist":["Identify the actuator and contact terminals.","State the intended operating mode.","Link additional contact blocks to the same operator device."],"distinction":"A NO contact symbol by itself does not identify the pushbutton actuator or its mechanical operating mode.","facts":[{"label":"Normal contact state","value":"Open"},{"label":"Operating mode","value":"Momentary or maintained; specify explicitly"},{"label":"Actuator purpose","value":"Circuit-specific label"},{"label":"Public Autodesk reference names","value":"HPB11, VPB11 (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-pushbuttons","relevance":"Public NO pushbutton and operating-mode variants."}],"related":["pushbutton-nc","normally-open-contact","selector-switch","relay-coil"],"artwork":"push-no","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/pushbutton-no","illustration":{"url":"https://eloragrid.ai/library/illustrations/pushbutton-no.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"autodesk-pushbuttons","title":"Pushbutton contact and actuator variants","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-9E8890C7-7176-47DD-8700-E02A16C1670E.htm","type":"cad-reference","scope":"Momentary and latching pushbuttons, normal contact states and mushroom actuators.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Public NO pushbutton and operating-mode variants."}]}