{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NN681J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NN681J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NN681J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NN681J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound Inductor, Unshielded, 680 µH, ±5%, 65 mA, 17 Ohm DCR, 1812 (4532 Metric) SMD.","salesMarkdown":"## 680 µH unshielded wirewound — DC-DC filter or low-current choke This Murata LQH43NN681J03L is a ferrite-core drum wirewound inductor in the 1812 footprint, delivering 680 µH ±5% at 1 kHz test frequency. The 65 mA current rating and 17 Ohm max DCR set the practical ceiling — it is sized for signal-line filtering or low-power DC-DC output chokes where series resistance matters for efficiency, not for bulk power delivery. Q factor of 40 at 796 kHz and a self-resonant frequency of 2.5 MHz mean the inductance stays flat well into the hundreds of kHz range, rolling off above 2.5 MHz where the parasitic capacitance starts to dominate. For a buck converter switching at 500 kHz or a common-mode filter on a CAN bus, this part holds its value through the frequency band of interest. Surface-mount 1812 (4532 metric) package, unshielded — the open magnetic path means the inductor radiates flux, so keep sensitive traces or other magnetics at least one part-width away on the layout. ## Sourcing — active, no cross-reference on record This is a standard-production part in the LQH43 series, available through authorized and independent distribution. No official second-source or pin-compatible alternative is documented; the 1812 footprint and 680 µH ±5% tolerance are the fit criteria for a BOM replacement. Supplied on Tape & Reel or Cut Tape — reel quantity is the standard procurement unit for high-volume builds; Cut Tape works for prototypes or low-volume runs. Compliance documentation (RoHS, REACH) is available from Murata on request.","metaTitle":"Murata LQH43NN681J03L Inductor, 680 µH, 65 mA, 1812","metaDescription":"Murata LQH43NN681J03L unshielded wirewound inductor, 680 µH ±5%, 65 mA rated current, 17 Ohm DCR, 1812 SMD. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Inductors & Chokes"],"specifications":{"Mfr":"Murata Electronics","Type":"Drum Core, Wirewound","Series":"LQH43","Package":"Tape & Reel (TR); Cut Tape (CT)","Ratings":"-","Q @ Freq":"40 @ 796kHz","Shielding":"Unshielded","Tolerance":"±5%","Inductance":"680 µH","Mounting Type":"Surface Mount","Package / Case":"1812 (4532 Metric)","Product Status":"Active","Material - Core":"Ferrite","lifecycle_stage":"unknown","Size / Dimension":"0.177\\\" L x 0.126\\\" W (4.50mm x 3.20mm)","Base Product Number":"LQH43NN","DC Resistance (DCR)":"17Ohm Max","Current Rating (Amps)":"65 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C~105°C","Supplier Device Package":"1812 (4532 Metric)","Frequency - Self Resonant":"2.5MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 kHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6000","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d0d6b1d39c76e30b3c05600906460c39.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is LQH43NN681J03L's listed type and series?","answer":"The type is Drum Core, Wirewound and the series is LQH43. It is an unshielded ferrite-core inductor in the 1812 SMD package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NN681J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NN681J03L when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}