{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NN180K03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NN180K03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NN180K03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NN180K03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound Inductor, 18 µH, ±10%, 340 mA, 820 mOhm DCR, Unshielded, 1812 (4532 Metric), Tape & Reel.","salesMarkdown":"## 18 µH, 340 mA — the DCR sets the current ceiling The LQH43NN180K03L is a Murata drum-core wirewound inductor from the LQH43 series, rated 18 µH ±10% at 1 MHz test frequency. Its 340 mA current rating is paired with a 820 mOhm max DC resistance — the DCR is the limiting factor for continuous current, not core saturation, so the temperature rise under load is what governs the real-world derating. Unshielded construction means the magnetic field extends beyond the component body — keep a clearance zone around adjacent traces or other inductors in a power filter stage to avoid coupling. ## Q factor and self-resonant frequency — bandwidth limits Q factor is 35 at 1 MHz, and the self-resonant frequency is 17 MHz. Below about 5 MHz the impedance is inductive and useful for filtering; above that the parasitic capacitance starts to dominate and the inductor behaves capacitively. For a DC-DC converter switching at 1–2 MHz, this part stays well within its inductive region. Ferrite core material gives stable inductance over temperature within the -40 to 105 °C operating range — no significant drift until approaching the Curie point of the ferrite, which is well above 105 °C. ## Active lifecycle — no obsolescence watch needed It is a standard catalogue part in the LQH43 series, available through distribution channels. Store the reels in a dry environment; the part is not moisture-sensitive per Murata's standard handling, but the reel packaging benefits from <60% RH storage.","metaTitle":"Murata LQH43NN180K03L 18 µH Inductor, 340 mA, 1812","metaDescription":"Murata LQH43NN180K03L drum core wirewound inductor, 18 µH ±10%, 340 mA rated, 820 mOhm DCR, 1812 SMD. Active lifecycle. Order against RFQ.","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":"35 @ 1MHz","Shielding":"Unshielded","Tolerance":"±10%","Inductance":"18 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)":"820mOhm Max","Current Rating (Amps)":"340 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 105°C","Supplier Device Package":"1812 (4532 Metric)","Frequency - Self Resonant":"17MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5500","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d0d6b1d39c76e30b3c05600906460c39.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How can I order LQH43NN180K03L or check current pricing?","answer":"This part is active and sourced through distribution."},{"question":"What is the inductance and current rating of LQH43NN180K03L?","answer":"18 µH ±10% at 1 MHz test frequency, rated for 340 mA continuous with a maximum DC resistance of 820 mOhm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NN180K03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NN180K03L 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}}