{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43MN391K03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43MN391K03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43MN391K03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43MN391K03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series drum core wirewound inductor, LQH43MN391K03L, 390 µH, ±10%, 90 mA, 9.7 Ohm DCR, unshielded, 1812 SMD package.","salesMarkdown":"## 390 µH drum core wirewound — the DC resistance trade-off The LQH43MN391K03L is a 390 µH unshielded drum core wirewound inductor from Murata's LQH43 series, housed in a standard 1812 (4532 metric) surface-mount package. ## Self-resonant frequency and unshielded field — fit for low-frequency filtering With a self-resonant frequency of 3.3 MHz, this inductor behaves inductively up to that point; above it the parasitic capacitance dominates and the impedance rolls off. The unshielded construction means the magnetic field extends beyond the package — keep a keep-out zone around the part when placing near sensitive analog or RF traces, or budget for field coupling into adjacent loops. The Q factor of 40 at 796 kHz gives a reasonable figure of merit for resonant tank or filter applications in the low-MHz range. The ferrite core material supports the inductance density in the 1812 footprint but saturates earlier than an air-core or powdered-iron alternative at the same current — the 90 mA rating already accounts for the core's saturation knee. ## Active lifecycle — no end-of-life pressure for new designs The 1812 footprint is widely used across multiple Murata LQH43 variants and competitive wirewound inductors, so a second-source fallback exists within the same pad layout if supply tightens.","metaTitle":"Murata LQH43MN391K03L 390 µH Inductor, 90 mA, 1812","metaDescription":"Murata LQH43MN391K03L drum core wirewound inductor, 390 µH ±10%, 90 mA, 9.7 Ohm DCR, 1812 SMD. 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)","Ratings":"-","Q @ Freq":"40 @ 796kHz","Shielding":"Unshielded","Tolerance":"±10%","Inductance":"390 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)":"9.7Ohm Max","Current Rating (Amps)":"90 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C~85°C","Supplier Device Package":"1812","Frequency - Self Resonant":"3.3MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2489","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d1493e4ce66984c31e9b5c6bbb04d9e5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to LQH43MN391K03L?","answer":"Any 1812 (4532 metric) unshielded wirewound inductor with the same 390 µH inductance and ±10% tolerance from the LQH43 series shares the same footprint and pad layout. The exact current rating and DCR vary by variant — check the DC resistance and saturation current against your load before substituting."},{"question":"What compliance documentation does Murata provide for LQH43MN391K03L?","answer":"Murata provides RoHS and REACH compliance declarations for the LQH43 series. The part is also halogen-free per Murata's standard material declarations. No UL or IEC certification is listed for this inductor — those certifications typically apply to mains-connected components, not low-voltage SMD inductors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43MN391K03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43MN391K03L 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}}