{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NN2R2M03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NN2R2M03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NN2R2M03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NN2R2M03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series drum-core wirewound inductor, 2.2 µH ±20%, 500 mA, 300 mOhm DCR, unshielded, 1812 (4532 Metric) surface-mount package.","salesMarkdown":"## 2.2 µH, 500 mA — DC-DC filtering fit The LQH43NN2R2M03L is a 2.2 µH drum-core wirewound inductor from Murata's LQH43 series, rated for 500 mA continuous current with a maximum DC resistance of 300 mOhm. For a typical 3.3 V buck converter switching at 1 MHz, this inductance value and current rating suit output filtering for loads drawing up to about 400 mA after derating for core loss and ambient temperature. The 300 mOhm DCR at 500 mA produces a conduction loss of 75 mW — acceptable in most designs but worth stacking into the thermal budget if the inductor sits near other heat sources in a confined enclosure. ## Unshielded drum core — placement discipline required This is an unshielded ferrite-core inductor. The open magnetic field radiates into the surrounding PCB area; keep sensitive analog traces, RF nodes, and low-level sensor inputs at least 5 mm away, or shield the inductor with a grounded copper pour on the layer below. The self-resonant frequency of 62 MHz is well above the 1–2 MHz switching range of most point-of-load converters, so the inductor behaves as a pure inductance in that band. The Q factor of 20 at 1 MHz is moderate — adequate for power filtering but not for resonant tank circuits where a higher Q (above 50) is typically specified. ## Temperature grade and operating envelope The ferrite core's saturation current derates above 85°C; at 105°C ambient the effective current rating drops to roughly 70% of the 25°C value, so budget 350 mA as the practical ceiling in a hot enclosure. ## 1812 footprint — board integration Tape-and-reel packaging supports automated pick-and-place. Tolerance is ±20% — typical for power-grade wirewound inductors in this value range. The inductance is tested at 1 MHz, which is the standard test frequency for this class of part.","metaTitle":"Murata LQH43NN2R2M03L 2.2 µH Inductor, 500 mA, 1812","metaDescription":"Murata LQH43NN2R2M03L drum-core wirewound inductor, 2.2 µH ±20%, 500 mA, 300 mOhm DCR, 1812 package. Active production, sourced per RFQ.","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":"2.2 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":"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":"62MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5500","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d0d6b1d39c76e30b3c05600906460c39.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the listed type and series for LQH43NN2R2M03L?","answer":"The type is Drum Core, Wirewound and the series is LQH43."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NN2R2M03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NN2R2M03L 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}}