{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NN1R8M03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NN1R8M03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NN1R8M03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NN1R8M03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound Inductor, 1.8 µH, 500 mA, 300 mOhm DCR, Unshielded, 1812 (4532 Metric) SMD, Tape & Reel.","salesMarkdown":"## Core construction and what it means for your filter The LQH43NN1R8M03L is a drum-core, wirewound inductor in Murata's LQH43 series. The ferrite core and unshielded construction mean the magnetic field extends beyond the component body — keep a clearance zone around adjacent traces or other magnetics to avoid coupling. Rated 1.8 µH at 1 MHz test frequency, it carries 500 mA DC current before the inductance drops due to saturation or self-heating. The 300 mOhm max DCR sets the copper loss: at full rated current the I²R loss is 75 mW, negligible in most power rails but worth factoring into a low-voltage supply budget. The self-resonant frequency of 75 MHz is well above the switching frequencies of typical DC-DC converters (500 kHz to 2 MHz), so the inductor behaves as a pure inductance in that band. The Q factor of 20 at 1 MHz indicates moderate energy storage efficiency — adequate for general-purpose filtering and decoupling. The footprint matches the industry-standard 1812 land pattern — no special pad geometry needed. The unshielded body means the inductor's magnetic field can couple into nearby loops — maintain a keep-out zone of at least one body width around the part on the layout. Pricing and lead time are confirmed at quote time against your BOM quantity — sourced through authorized and independent distribution channels.","metaTitle":"Murata LQH43NN1R8M03L Drum Core Inductor, 1.8 µH, 500 mA","metaDescription":"Murata LQH43NN1R8M03L wirewound drum core inductor, 1.8 µH ±20%, 500 mA, 300 mOhm 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) Cut Tape (CT)","Ratings":"-","Q @ Freq":"20 @ 1MHz","Shielding":"Unshielded","Tolerance":"±20%","Inductance":"1.8 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)":"300mOhm Max","Current Rating (Amps)":"500 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 105°C","Supplier Device Package":"1812 (4532 Metric)","Frequency - Self Resonant":"75MHz","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 LQH43NN1R8M03L in the same family?","answer":"No official pin-compatible alternative or successor is listed for this specific inductance and current rating. Other LQH43 series parts share the same 1812 footprint but differ in inductance, DCR, or current rating — confirm the BOM position before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NN1R8M03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NN1R8M03L 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}}