{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43MN390J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43MN390J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43MN390J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43MN390J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound Inductor, 39 µH, ±5%, 240 mA, Unshielded, 1812 (4532 Metric), Surface Mount.","salesMarkdown":"## 39 µH wirewound inductor for DC-DC filtering and bias-T circuits The Murata LQH43MN390J03L is a 39 µH drum-core wirewound inductor in the LQH43 series, packaged in an 1812 (4532 metric) surface-mount footprint. Rated for 240 mA continuous current with a maximum DC resistance of 1.4 Ohm, this part suits low-to-moderate current filtering in DC-DC converter output stages, bias-T networks, and signal-line noise suppression where the inductance value and tolerance (±5%) need to be held tight. ## Unshielded construction and self-resonant frequency The unshielded drum-core design means the magnetic field extends beyond the component body — adjacent traces and components should be kept at a distance to avoid coupling, especially in dense layouts. Self-resonant frequency is 11 MHz; above this the inductor behaves capacitively, limiting the useful band to roughly DC–10 MHz for impedance-based filtering. Quality factor is 35 at 1 MHz test frequency, indicating moderate AC loss at that point — adequate for general-purpose filtering but not optimized for high-Q resonant tank circuits. ## Thermal and mechanical fit for 1812 pads Operating temperature range is -40°C to +85°C, covering most commercial and industrial indoor environments but not extended automotive or high-temp applications.","metaTitle":"Murata LQH43MN390J03L Inductor, 39 µH, 240 mA, 1812","metaDescription":"Murata LQH43MN390J03L drum core wirewound inductor, 39 µH ±5%, 240 mA rated current, 1.4 Ohm DCR, 1812 SMD. 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)","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":"LQH43MN","DC Resistance (DCR)":"1.4Ohm Max","Current Rating (Amps)":"240 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"1812","Frequency - Self Resonant":"11MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2299","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d1493e4ce66984c31e9b5c6bbb04d9e5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the inductance tolerance and test frequency?","answer":"Inductance is 39 µH with ±5% tolerance, tested at 1 MHz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43MN390J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43MN390J03L 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}}