{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43MN120J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43MN120J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43MN120J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43MN120J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound Inductor, 12 µH, ±5%, 380 mA, 620 mOhm DCR, Unshielded, 1812 (4532 Metric), Tape & Reel.","salesMarkdown":"## 12 µH wirewound inductor for power and signal filtering The Murata LQH43MN120J03L is a drum core, wirewound inductor in the LQH43 series, offering 12 µH inductance with ±5% tolerance in a standard 1812 (4532 Metric) surface-mount package. Rated for 380 mA continuous current with a maximum DC resistance of 620 mOhm, this part suits low-to-moderate current rails in DC-DC converters, EMI filtering, and signal conditioning where the unshielded construction is acceptable. ## Key electrical parameters and what they mean for your circuit The 12 µH inductance at 1 MHz test frequency, combined with a self-resonant frequency of 21 MHz, means the inductor behaves as an inductor up to roughly 21 MHz — above that, parasitic capacitance dominates and the impedance rolls off. A Q factor of 35 at 1 MHz indicates moderate efficiency at that frequency; for higher-Q needs in tuned circuits, a different core geometry may be preferred. The 620 mOhm DCR produces about 90 mW of I²R loss at full rated current — a factor to budget in thermal design, especially in dense boards with limited airflow. The unshielded drum core design means magnetic flux radiates from the component — keep sensitive traces or low-impedance loops at least 2–3 mm away to avoid coupling.","metaTitle":"Murata LQH43MN120J03L Drum Core Inductor, 12 µH, 380 mA","metaDescription":"Murata LQH43MN120J03L wirewound drum core inductor, 12 µH ±5%, 380 mA rated, 620 mOhm DCR, 21 MHz SRF, 1812 SMD. Active production. Request quote.","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":"12 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)":"620mOhm Max","Current Rating (Amps)":"380 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C~85°C","Supplier Device Package":"1812","Frequency - Self Resonant":"21MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2584","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d1493e4ce66984c31e9b5c6bbb04d9e5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the inductance and current rating of LQH43MN120J03L?","answer":"It is a 12 µH inductor rated for 380 mA continuous current, with a maximum DC resistance of 620 mOhm and a self-resonant frequency of 21 MHz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43MN120J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43MN120J03L 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}}