{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NH180J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NH180J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NH180J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NH180J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound Inductor, 18 µH, ±5%, 365 mA, 420 mOhm DCR, 1812 (4532 Metric), AEC-Q200.","salesMarkdown":"## 18 µH wirewound for automotive and industrial DC-DC The Murata LQH43NH180J03L is a ferrite-core wirewound inductor from the LQH43 series, rated 18 µH ±5% at 1 MHz. It carries a 365 mA current rating and a maximum DC resistance of 420 mOhm — the DCR sets the I²R heating floor for the power path, so the 365 mA figure assumes the self-heating stays within the component's thermal budget. ## Self-resonant frequency and Q factor The self-resonant frequency is 17 MHz — above that point the inductor behaves capacitively, so the useful filtering band stops well before 17 MHz. The Q factor is 35 at 1 MHz, which is the test frequency; Q peaks near the SRF and drops off on either side, so for a 1 MHz switching converter the core losses are moderate. Unshielded construction means the magnetic field couples into nearby traces and components. In a dense layout, keep the inductor away from sensitive analog loops or add a ground ring around the footprint to contain the fringe field. The surface-mount pads follow the standard 1812 land pattern — the copper pad area under the component sets the heat dissipation path, so the 365 mA rating assumes the board's copper pours carry the heat away. Cut Tape works for prototype builds and rework bench stock.","metaTitle":"Murata LQH43NH180J03L 18 µH Wirewound Inductor, 365 mA","metaDescription":"Murata LQH43NH180J03L wirewound inductor, 18 µH, 365 mA, 420 mOhm DCR, AEC-Q200, 1812 package. 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":"AEC-Q200","Features":"-","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":"LQH43NH","DC Resistance (DCR)":"420mOhm Max","Current Rating (Amps)":"365 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C~125°C","Supplier Device Package":"1812","Frequency - Self Resonant":"17MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6900","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b8fe98626664ecf0068858b1162f6220.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the inductance and current rating of LQH43NH180J03L?","answer":"The inductance is 18 µH at 1 MHz test frequency, with a tolerance of ±5%. The DC current rating is 365 mA, limited by the 420 mOhm maximum DCR and the resulting self-heating."},{"question":"What compliance documentation does Murata provide for LQH43NH180J03L?","answer":"The part carries AEC-Q200 automotive qualification. RoHS and REACH compliance documentation is standard for the LQH43 series. Specific certificates are available upon request with the RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NH180J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NH180J03L 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}}