{"schemaVersion":1,"slug":"isolated-dc-dc-converter","name":"Isolated DC-to-DC converter","kind":"symbol","abbreviation":"DC/DC ISO","aliases":["galvanically isolated DC/DC converter","transformer-isolated DC converter","isolated DC/DC module"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A DC/DC converter with an internal high-frequency transformer that separates input and output galvanically.","description":["An isolated DC/DC converter uses a high-frequency transformer between its input and output stages, so the two DC systems have no conductive connection. Isolation lets the output be earthed differently from the input, for example a floating battery bus supplying an earthed control system, or keeps a fault on one side from reaching the other.","Drawings show the DC/DC box with a transformer mark or a pair of coupled coils inside, or a vertical double line across the box. The isolation voltage is a key rating and should be written beside it.","The symbol alone does not state the test voltage or whether the isolation is functional or reinforced for safety. Those properties decide whether the output can be treated as a separated circuit, so they must be read from the product data."],"readingNotes":["A transformer mark inside the box shows isolation.","Read the isolation rating rather than assuming safety separation."],"drawingChecklist":["State input and output voltages and isolation voltage.","Show earthing on each side.","Reference isolation class."],"distinction":"An isolated converter separates input and output; a non-isolated buck or boost converter shares a common conductor.","facts":[{"label":"Isolation element","value":"High-frequency transformer"},{"label":"Earthing","value":"Each side can be earthed independently"},{"label":"Key rating","value":"Isolation test voltage"},{"label":"Preview","value":"Independent educational illustration; consult the applicable standard and project legend for the exact graphic"}],"references":[{"sourceId":"pub-electronics-ti-topologies","relevance":"Public power topology tutorials including isolated converters."},{"sourceId":"pub-object-tdk-din","relevance":"Public DC power supply and converter family context."}],"related":["dc-to-dc-converter","bidirectional-dc-dc-converter","flyback-converter-topology","full-bridge-dc-converter-topology"],"artwork":"s28-isolated-dc-dc-converter","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","plainEnglish":{"title":"What does Isolated DC-to-DC converter mean?","introduction":"An isolated DC/DC converter uses a high-frequency transformer between its input and output stages, so the two DC systems have no conductive connection. Isolation lets the output be earthed differently from the input, for example a floating battery bus supplying an earthed control system, or keeps a fault on one side from reaching the other.","example":"Drawings show the DC/DC box with a transformer mark or a pair of coupled coils inside, or a vertical double line across the box. The isolation voltage is a key rating and should be written beside it.","drawings":"The symbol alone does not state the test voltage or whether the isolation is functional or reinforced for safety. Those properties decide whether the output can be treated as a separated circuit, so they must be read from the product data.","terms":[{"name":"DC","meaning":"Direct current: electricity flowing in one direction."},{"name":"Winding","meaning":"A coil of conductor inside an electrical machine or transformer."},{"name":"Normally open / normally closed","meaning":"The contact state in the normal condition defined for the drawing."}],"diagram":"flow","steps":["Identify the device and form","Read the connections and state","Check the equipment reference"],"caption":"A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.","sources":[{"label":"Power topology selection and public topology tutorials","url":"https://www.ti.com/video/series/power-topology-selection.html"},{"label":"DIN-rail power supply, buffer, redundancy and UPS families","url":"https://www.emea.lambda.tdk.com/uk/products/din-rail"}],"detail":"A DC/DC converter with an internal high-frequency transformer that separates input and output galvanically. An isolated converter separates input and output; a non-isolated buck or boost converter shares a common conductor.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/isolated-dc-dc-converter","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/isolated-dc-dc-converter.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pub-electronics-ti-topologies","title":"Power topology selection and public topology tutorials","publisher":"Texas Instruments","url":"https://www.ti.com/video/series/power-topology-selection.html","type":"manufacturer","scope":"Public tutorials identifying buck, boost, buck-boost, SEPIC, Cuk, Zeta, flyback, forward, push-pull and bridge conversion arrangements. Catalogue previews are conceptual topology/function blocks, not certified standard glyphs or complete power-stage schematics.","checkedOn":"2026-10-14","reuse":"link-only","relevance":"Public power topology tutorials including isolated converters."},{"id":"pub-object-tdk-din","title":"DIN-rail power supply, buffer, redundancy and UPS families","publisher":"TDK-Lambda","url":"https://www.emea.lambda.tdk.com/uk/products/din-rail","type":"manufacturer","scope":"Public functional classification of DIN-rail product families; exact model selection and technical values remain in the data sheet.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Public DC power supply and converter family context."}]}