{"schemaVersion":1,"slug":"ansi-thermal-circuit-breaker","name":"ANSI/IEEE thermal circuit breaker symbol","kind":"symbol","abbreviation":"CB TH","aliases":["IEEE thermal circuit breaker symbol","ANSI thermal circuit breaker symbol","HCB11TH"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for thermal circuit breaker, with public vendor evidence and drawing-reading notes.","description":["The thermal breaker form adds a temperature-responsive protection concept to the circuit-interruption path. Reading it requires both the overload characteristic and the device's short-circuit rating; the small protection modifier is not a complete time-current curve.","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."],"readingNotes":["Keep the thermal function linked to the breaker it operates.","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."],"drawingChecklist":["Identify thermal setting","Reference time-current data","State breaking rating"],"distinction":"A thermal qualifier describes protection response, while a trip-contact symbol describes a separate control connection.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — 1 Pole Circuit Breakers"},{"label":"Public vendor block name","value":"HCB11TH (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-7f08a484-0517-4954-bd68-1648ddbc84a1","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["thermal-circuit-breaker","circuit-breaker","52-ac-circuit-breaker"],"artwork":"edu-ansi-thermal-circuit-breaker","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented 1 Pole Circuit Breakers functional form","counterpart":"thermal-circuit-breaker","reference":"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."},"url":"https://eloragrid.ai/symbols/ansi-thermal-circuit-breaker","illustration":{"url":"https://eloragrid.ai/library/illustrations/ansi-thermal-circuit-breaker.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"ansi-autodesk-7f08a484-0517-4954-bd68-1648ddbc84a1","title":"Autodesk IEEE Symbol Preview — 1 Pole Circuit Breakers","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7F08A484-0517-4954-BD68-1648DDBC84A1.htm","type":"cad-reference","scope":"Verified public IEEE-oriented vendor catalogue. Block names identify vendor symbols, not IEEE standard symbol numbers. Linked only; graphics and CAD files are not redistributed. IEEE/ANSI 315-1975 is a historical graphics reference with Inactive-Reserved status; this page does not certify current standards compliance.","checkedOn":"2026-10-14","reuse":"link-only","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"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":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}]}