{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NH3R9J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NH3R9J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NH3R9J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NH3R9J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series drum core wirewound inductor, 3.9 µH, ±5%, 650 mA, 144 mOhm DCR, unshielded, 1812 (4532 Metric), AEC-Q200.","salesMarkdown":"## 3.9 µH wirewound for power and signal filtering The Murata LQH43NH3R9J03L is a drum core wirewound inductor in the LQH43 series, rated 3.9 µH with ±5% tolerance. It carries a 650 mA current rating and a maximum DC resistance of 144 mOhm, making it a fit for DC-DC converter output filtering or power rail smoothing where the 650 mA ceiling matches the load current. The 41 MHz self-resonant frequency means it stays inductive well above the switching frequencies of most buck converters, so the impedance curve is predictable up to that point. The Q factor of 20 at 1 MHz is typical for a ferrite-core wirewound in this inductance range — useful for tuned circuits or impedance matching at lower frequencies. ## AEC-Q200 qualification and temperature range This inductor carries AEC-Q200 qualification, the automotive passive-component stress test standard. That means it has passed thermal shock, vibration, solderability, and moisture resistance testing per the AEC-Q200 rev D regime. ## 1812 footprint and unshielded construction The unshielded drum core design means magnetic flux radiates outside the component — keep sensitive traces or other inductors at least one package width away to avoid coupling. The ferrite core material gives stable inductance over temperature compared to powdered-iron cores, though saturation current is not listed in this spec set. For a 650 mA-rated part, the saturation knee typically sits above the rated current, but the actual margin depends on the DC bias curve in the full datasheet.","metaTitle":"Murata LQH43NH3R9J03L Inductor, 3.9 µH, 650 mA, 1812","metaDescription":"Murata LQH43NH3R9J03L drum core wirewound inductor, 3.9 µH ±5%, 650 mA rated current, 144 mOhm DCR, AEC-Q200 qualified. Active production, 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":"AEC-Q200","Features":"-","Q @ Freq":"20 @ 1MHz","Shielding":"Unshielded","Tolerance":"±5%","Inductance":"3.9 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)":"144mOhm Max","Current Rating (Amps)":"650 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 125°C","Supplier Device Package":"1812","Frequency - Self Resonant":"41MHz","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":"Where can I buy the LQH43NH3R9J03L and check stock?","answer":"This part is available to order through independent and authorized distribution. Stock levels and lead time are confirmed at the time of RFQ — submit a quote request with your target quantity for current availability and pricing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NH3R9J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NH3R9J03L 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}}