{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NN331K03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NN331K03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NN331K03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NN331K03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series drum core wirewound inductor, 330 µH, ±10%, unshielded, 95 mA rated current, 8.2 Ohm DCR, 1812 (4532 Metric) surface-mount package.","salesMarkdown":"## 330 µH wirewound for filtering and bias-T applications The Murata LQH43NN331K03L is a drum-core wirewound inductor offering 330 µH ±10% in the standard 1812 (4532 Metric) surface-mount footprint. It is part of the LQH43 series, built on a ferrite core with an unshielded construction. Rated at 95 mA DC, the inductor's 8.2 Ohm maximum DCR sets the resistive loss at full load — a 95 mA current through 8.2 Ohm dissipates about 74 mW, which is manageable within the 1812 package's thermal budget at 105°C ambient. ## Self-resonant frequency and frequency-domain fit With a self-resonant frequency of 3.6 MHz, this inductor behaves inductively up to that point; above it the impedance turns capacitive. The Q factor of 40 at 796 kHz indicates moderate energy storage efficiency in the low-MHz range, typical for a wirewound part at this inductance. The inductance is tested at 1 MHz, confirming the part is characterized for switching frequencies and filter designs near that point. For a supply decoupling or bias-T application at 1–3 MHz, the 330 µH value provides a high impedance to AC ripple while passing the DC bias current. ## Package, temperature range, and layout considerations The unshielded design means the magnetic field radiates — adjacent traces carrying sensitive analog signals or high-impedance nodes should be kept at least one body width away to avoid coupling. The ferrite core material maintains stable inductance across this range, though DCR rises with temperature per the copper winding's positive temperature coefficient. ## Sourcing and supply posture It is available through independent distribution channels, quoted to order against BOM quantities. The base product number LQH43NN covers the full series; the suffix K03L denotes the 330 µH ±10% variant. Tape-and-reel packaging (Cut Tape also available) supports both prototype and production volumes.","metaTitle":"Murata LQH43NN331K03L Inductor, 330 µH, 95 mA, 1812","metaDescription":"Murata LQH43NN331K03L drum core wirewound inductor, 330 µH ±10%, 95 mA rated current, 8.2 Ohm DCR, 1812 footprint. Active lifecycle, 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":"40 @ 796kHz","Shielding":"Unshielded","Tolerance":"±10%","Inductance":"330 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":"LQH43NN","DC Resistance (DCR)":"8.2Ohm Max","Current Rating (Amps)":"95 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 105°C","Supplier Device Package":"1812 (4532 Metric)","Frequency - Self Resonant":"3.6MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2600","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d0d6b1d39c76e30b3c05600906460c39.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the self-resonant frequency of LQH43NN331K03L and why does it matter?","answer":"The self-resonant frequency is 3.6 MHz. Above this frequency the inductor behaves capacitively, so it should not be used as an inductor in filter or DC-DC converter designs operating above 3.6 MHz."},{"question":"What is the closest pin-compatible alternative to LQH43NN331K03L?","answer":"The LQH43 series includes other inductance values in the same 1812 footprint and pinout — verify the specific inductance and current rating needed for the BOM position."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NN331K03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NN331K03L 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}}