{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NH1R2K03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NH1R2K03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NH1R2K03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NH1R2K03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series drum core wirewound inductor, 1.2 µH ±10%, 1.1 A, 51.6 mOhm DCR, unshielded, ferrite core, 1812 (4532 Metric) SMD, AEC-Q200 rated.","salesMarkdown":"## 1.2 µH wirewound with AEC-Q200 qualification The Murata LQH43NH1R2K03L is a drum core, wirewound inductor in the LQH43 series, offering 1.2 µH inductance with ±10% tolerance. Rated for 1.1 A continuous current and a maximum DC resistance of 51.6 mOhm, it is built for power filtering and DC-DC converter output stages where low loss and stable inductance matter. ## What the key ratings mean for your BOM The 1.1 A current rating is the saturation-limited DC current at which inductance typically drops 10% — for a 12 V to 3.3 V buck converter delivering 0.8 A, this inductor stays well within its linear region, but a 1.2 A load would push it into saturation and raise ripple current. 51.6 mOhm max DCR at 25°C translates to about 62 mW of I²R loss at 1.1 A — negligible for most boards, but if the inductor sits in a high-ambient engine bay (105°C), the copper resistance rises roughly 40%, pushing losses to ~87 mW and raising the winding temperature above the 125°C limit. Self-resonant frequency of 100 MHz means the inductor behaves inductively up to about 10-20 MHz in a typical buck converter — above that, parasitic capacitance between windings turns it capacitive, so it should not be used as a filter choke above 20 MHz. The ferrite core is unshielded, so magnetic coupling to adjacent traces or components is a real concern; keep sensitive analog or RF traces at least 5 mm away, or switch to a shielded variant in the same series.","metaTitle":"Murata LQH43NH1R2K03L 1.2 µH Wirewound Inductor, 1.1 A","metaDescription":"Murata LQH43NH1R2K03L drum core wirewound inductor, 1.2 µH ±10%, 1.1 A, 51.6 mOhm DCR, AEC-Q200, 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) Cut Tape (CT)","Ratings":"AEC-Q200","Features":"-","Q @ Freq":"20 @ 1MHz","Shielding":"Unshielded","Tolerance":"±10%","Inductance":"1.2 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":"LQH43NH","DC Resistance (DCR)":"51.6mOhm Max","Current Rating (Amps)":"1.1 A","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 125°C","Supplier Device Package":"1812","Frequency - Self Resonant":"100MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6100","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b8fe98626664ecf0068858b1162f6220.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is LQH43NH1R2K03L AEC-Q200 qualified?","answer":"Yes, it carries AEC-Q200 automotive qualification, meaning it has passed the stress tests for thermal shock, moisture resistance, and vibration required for automotive-grade passive components."},{"question":"What is the self-resonant frequency of LQH43NH1R2K03L?","answer":"The self-resonant frequency is 100 MHz. Above that frequency the inductor behaves capacitively, so it is best suited for DC-DC converter switching frequencies up to about 20 MHz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NH1R2K03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NH1R2K03L 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}}