{"schemaVersion":1,"slug":"moulded-case-circuit-breaker","name":"Moulded-case circuit breaker","kind":"symbol","abbreviation":"MCCB","aliases":["molded case circuit breaker"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An MCCB is a low-voltage circuit breaker built in a moulded insulating case.","description":["An MCCB is a low-voltage circuit breaker built in a moulded insulating case. Distribution drawings identify its frame, trip rating and trip-unit functions where those affect selection or coordination."],"readingNotes":["Frame size and configured trip current can be different values.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify frame and trip ratings","State breaking capacity","Reference trip-unit settings"],"distinction":"An MCCB outline on an SLD does not establish a manufacturer's mounting footprint.","facts":[{"label":"Drawing role","value":"Circuit interruption"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"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."}],"references":[{"sourceId":"pub-symbol-breaker-types","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["circuit-breaker","52-ac-circuit-breaker"],"artwork":"edu-moulded-case-circuit-breaker","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/moulded-case-circuit-breaker","illustration":{"url":"https://eloragrid.ai/library/illustrations/moulded-case-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":"pub-symbol-breaker-types","title":"Circuit breakers and switches","publisher":"Schneider Electric","url":"https://www.se.com/au/en/product-category/4200-circuit-breakers-and-switches/","type":"manufacturer","scope":"Public manufacturer explanation of the equipment function and selection context.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}]}