{"schemaVersion":1,"slug":"iec-carbon-disc-variable-resistor","name":"Carbon-disc variable resistor","kind":"symbol","abbreviation":"HVR1R8","aliases":["Carbon-disc variable resistor symbol","HVR1R8","Carbon-disc variable resistor IEC reference"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies the publisher's carbon-disc variable-resistance form.","description":["This representation identifies the publisher's carbon-disc variable-resistance form. The publisher identifies a variable resistive form using carbon discs as part of its operating construction. That identifies a component principle without assigning a resistance law or power rating.","Document the actual control mechanism and terminal arrangement where the device appears in a legacy circuit. It should not be silently replaced with a potentiometer having a different connection and operating behaviour."],"readingNotes":["State the resistance-control mechanism and associated terminals in the equipment description.","The material/mechanism indication is distinct from a generic electronic potentiometer."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the resistance-control mechanism and associated terminals in the equipment description.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The material/mechanism indication is distinct from a generic electronic potentiometer.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HVR1R8 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the resistance-control mechanism and associated terminals in the equipment description."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"autodesk-resistors","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["resistor","capacitor"],"artwork":"edu-iec-carbon-disc-variable-resistor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Carbon-disc variable resistor","reference":"Autodesk IEC-60617 Symbol Preview — Resistive component forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-carbon-disc-variable-resistor","illustration":{"url":"https://eloragrid.ai/library/illustrations/iec-carbon-disc-variable-resistor.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"autodesk-resistors","title":"Resistors and heater-element symbols","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-1D071951-D38E-4B15-8B9E-C30ECBD55C19.htm","type":"cad-reference","scope":"Fixed and variable resistive components, shunts and heater elements.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}]}