{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NN180J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NN180J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NN180J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NN180J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core, Wirewound Inductor, 18 µH, ±5%, 340 mA, 820 mOhm DCR, Unshielded, 1812 (4532 Metric) SMD.","salesMarkdown":"## 18 µH, 340 mA — the DC bias limit and loss budget The LQH43NN180J03L is a Murata drum-core wirewound inductor delivering 18 µH ±5% with a rated current of 340 mA. The 820 mOhm DCR sets the resistive loss at 96 mW at rated current — a figure that drives self-heating and must be factored into the power budget, especially in compact 1812 layouts where airflow is limited. ## Unshielded ferrite core — layout coupling awareness The ferrite core is unshielded, so the magnetic field extends beyond the component body. In a dense PCB, adjacent traces carrying sensitive analog signals or high-speed edges can pick up coupled noise — keep a keep-out zone of at least one component width around the inductor, or orient it so the field axis points away from noise-sensitive circuitry. The self-resonant frequency is 17 MHz, and the Q factor measures 35 at 1 MHz. Above the SRF, the inductor behaves capacitively — the usable inductance holds within 10% up to about 5 MHz for most designs, beyond which the impedance roll-off must be verified against the circuit's operating frequency. ## 1812 footprint — board integration note The surface-mount footprint is standard across the LQH43 series — a single land pattern serves the full inductance range, simplifying last-minute value changes without a board spin.","metaTitle":"Murata LQH43NN180J03L Inductor, 18 µH, 340 mA, 1812","metaDescription":"Murata LQH43NN180J03L wirewound drum core inductor, 18 µH ±5%, 340 mA rated current, 820 mOhm DCR, 1812 SMD. Active production, sourced per 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":"±5%","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":"$0.2818","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d0d6b1d39c76e30b3c05600906460c39.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest alternative to LQH43NN180J03L in the LQH43 series?","answer":"Within the same LQH43 family, the inductance value is the primary differentiator. The 18 µH variant is flanked by 15 µH (LQH43NN150J03L) and 22 µH (LQH43NN220J03L) siblings, all sharing the same 1812 footprint, 340 mA current rating, and ±5% tolerance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NN180J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NN180J03L 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}}