{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NH120J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NH120J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NH120J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NH120J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound Inductor, 12 µH, ±5%, 420 mA, 300mOhm, Unshielded, 1812 (4532 Metric), AEC-Q200.","salesMarkdown":"## Active automotive-grade power inductor The Murata LQH43NH120J03L is an active-production wirewound drum-core inductor in the LQH43 series, qualified to AEC-Q200 for automotive applications. It delivers 12 µH ±5% at 420 mA continuous with a maximum DC resistance of 300 mOhm. The 1812 (4532 Metric) surface-mount footprint and -40 to +125 °C operating range suit it for DC-DC converter input/output filtering and power-supply decoupling in engine-control units, body controllers, and infotainment power stages. ## What the key ratings mean for the BOM At 420 mA the I²R loss through the 300 mOhm DCR is about 53 mW — the 1812 body in still air stays within the 125 °C rated limit without forced cooling, but derate current if ambient exceeds 85 °C or the part is packed next to other heat sources. The unshielded drum-core construction means the magnetic field radiates — keep sensitive analog traces, other inductors, or ferrite beads at least one body width away to avoid cross-coupling. With a Q of 35 at 1 MHz and a self-resonant frequency of 21 MHz, the inductor behaves as a pure inductance well above the 1–2 MHz switching frequencies common in automotive DC-DC converters. The SRF is high enough that capacitive coupling does not degrade filtering above the converter's fundamental. ## Sourcing and compliance RoHS compliance is standard for the series.","metaTitle":"Murata LQH43NH120J03L 12 µH Inductor, 420 mA, 1812","metaDescription":"Murata LQH43NH120J03L 12 µH wirewound inductor, 420 mA, 300 mOhm DCR, AEC-Q200. Active production, sourced to order. Request a 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) Cut Tape (CT)","Ratings":"AEC-Q200","Features":"-","Q @ Freq":"35 @ 1MHz","Shielding":"Unshielded","Tolerance":"±5%","Inductance":"12 µH","Mounting Type":"Surface Mount","Package / Case":"1812 (4532 Metric)","Material - Core":"Ferrite","lifecycle_stage":"unknown","Size / Dimension":"0.177\\\" L x 0.126\\\" W (4.50mm x 3.20mm)","Base Product Number":"LQH43NH","DC Resistance (DCR)":"300mOhm Max","Current Rating (Amps)":"420 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 125°C","Supplier Device Package":"1812","Frequency - Self Resonant":"21MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6900","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b8fe98626664ecf0068858b1162f6220.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NH120J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NH120J03L 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}}