{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NH391J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NH391J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NH391J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NH391J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series drum core wirewound inductor, 390 µH, ±5%, 80 mA, unshielded, 1812 (4532 Metric), AEC-Q200.","salesMarkdown":"## What the 80 mA rating and 8.28 Ω DCR mean on the bench The LQH43NH391J03L: Rated 80 mA continuous — that is the DC current that raises the temperature by the specified ΔT. The 8.28 Ω max DCR means at full rated current the self-heating is I²R = 53 mW, which is manageable in free air but needs a look at the board copper if you're stacking several of these in a filter bank. Self-resonant frequency is 3.3 MHz — above that the inductor looks capacitive. For a buck converter switching at 500 kHz you have plenty of margin; for a 2 MHz switcher the impedance roll-off starts to eat into the filtering. ## AEC-Q200 and the 125 °C ceiling — where this inductor lives AEC-Q200 qualified means it passed the automotive-grade stress tests: thermal shock, moisture resistance, vibration, and solder heat. ## Unshielded construction — placement matters Unshielded drum-core design means the magnetic field extends beyond the part body. Keep it at least one part-width away from sensitive analog traces, RF paths, or other magnetics to avoid coupling. 1812 (4532 Metric) footprint, 4.50 mm x 3.20 mm, seated height 2.80 mm max — standard reflow profile for a ferrite-core wirewound. No special pad geometry beyond the datasheet land pattern.","metaTitle":"Murata LQH43NH391J03L Inductor, 390 µH, 80 mA, 1812","metaDescription":"Murata LQH43NH391J03L drum core wirewound inductor, 390 µH ±5%, 80 mA, 8.28 Ω DCR, AEC-Q200, active. 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":"40 @ 796kHz","Shielding":"Unshielded","Tolerance":"±5%","Inductance":"390 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)":"8.28Ohm Max","Current Rating (Amps)":"80 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 125°C","Supplier Device Package":"1812","Frequency - Self Resonant":"3.3MHz","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":"What compliance documentation does Murata provide for LQH43NH391J03L?","answer":"The part carries AEC-Q200 qualification. RoHS and REACH compliance documentation is typically available from Murata for the LQH43 series; confirm with the supplier at RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NH391J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NH391J03L 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}}