{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NN390J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NN390J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NN390J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NN390J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43NN series, Drum Core Wirewound Inductor, 39 µH, ±5%, 240 mA, 1.4 Ohm DCR, 1812 (4532 Metric) SMT package.","salesMarkdown":"## 39 µH wirewound in a 1812 footprint The Murata LQH43NN390J03L is a 39 µH unshielded drum-core wirewound inductor in the LQH43 series, housed in a standard 1812 (4532 Metric) SMT package. The ferrite core and wirewound construction give it a Q factor of 35 at 1 MHz, which means the inductive reactance dominates the AC losses at that test point — useful for tuned circuits or filtering where the Q sets the selectivity or ripple attenuation. The self-resonant frequency of 11 MHz marks the upper bound where the inductor stops behaving inductively — above that, parasitic capacitance dominates and the impedance rolls off. ## Board-fit and footprint Surface-mount reflow compatible — the ferrite core handles standard lead-free profiles without cracking, but the unshielded construction means the magnetic field couples into adjacent traces or components within a few mm of the body. Keep power-stage inductors at least one part-width from sensitive analog or RF traces.","metaTitle":"Murata LQH43NN390J03L 39µH Wirewound Inductor, 240mA","metaDescription":"Murata LQH43NN390J03L wirewound drum core inductor, 39µH ±5%, 240mA rated current, 1.4Ohm DCR. 1812 SMT package. Active production, quoted 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":"35 @ 1MHz","Shielding":"Unshielded","Tolerance":"±5%","Inductance":"39 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)":"1.4Ohm Max","Current Rating (Amps)":"240 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 105°C","Supplier Device Package":"1812 (4532 Metric)","Frequency - Self Resonant":"11MHz","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":"What is the current rating and DCR of this inductor?","answer":"The LQH43NN390J03L is rated for 240 mA continuous current with a maximum DC resistance of 1.4 Ω. The DCR at 240 mA produces roughly 80 mW of self-heating, well within the 105°C temperature ceiling."},{"question":"What package does the LQH43NN390J03L use?","answer":"It is unshielded, so the magnetic field radiates — keep a component-width gap from sensitive circuits."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NN390J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NN390J03L 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}}