{"schemaVersion":1,"slug":"resistor","name":"Resistor","kind":"symbol","abbreviation":"R","aliases":["resistive component","fixed resistor","shunt resistor","HRE1B","VRE1B"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A resistive component with its value and purpose documented separately.","description":["A resistor representation identifies a resistive component in a circuit. Different drawing conventions can use different basic outlines, while additional qualifiers distinguish variable resistors, shunts or heating elements. The value, rating and purpose are separate annotations.","In power-system controls, a resistive component may belong to measurement, suppression or another specific circuit. A neutral-earthing resistor is a specialised system component and should not be identified only with an unqualified generic resistor mark."],"readingNotes":["Read the component value and application label alongside the mark.","Check whether a qualifier identifies a variable device, heater, shunt or another variant."],"drawingChecklist":["Reference resistance and rating information.","Identify the circuit purpose.","Distinguish specialised assemblies from a generic component."],"distinction":"IEC-style rectangular and other conventional resistor depictions can describe the same component concept, but qualifiers and documentation still matter.","facts":[{"label":"Component data","value":"Resistance and power rating"},{"label":"Variants","value":"Fixed, variable, shunt and other applications"},{"label":"Graphic convention","value":"Check the drawing legend"},{"label":"Public Autodesk reference names","value":"HRE1B, VRE1B (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-resistors","relevance":"Public fixed, variable, shunt and heater categories."},{"sourceId":"ieee-315","relevance":"Historical graphic-symbol reference; vendor conventions may differ."}],"related":["capacitor","relay-coil","terminal","power-transformer"],"artwork":"resistor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/resistor","illustration":{"url":"https://eloragrid.ai/library/illustrations/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":"Public fixed, variable, shunt and heater categories."},{"id":"ieee-315","title":"IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams","publisher":"IEEE Standards Association","url":"https://standards.ieee.org/ieee/315/515/","type":"standard","scope":"Graphic symbols and designation letters. IEEE lists this edition as Inactive-Reserved; it is a historical reference, not a claim of current compliance.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Historical graphic-symbol reference; vendor conventions may differ."}]}