{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43MN821J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43MN821J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43MN821J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43MN821J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound Inductor, 820 µH, 60 mA, Unshielded, 1812 (4532 Metric), ±5%.","salesMarkdown":"## 820 µH wirewound for low-current filtering and bias-T circuits The Murata LQH43MN821J03L is a drum-core wirewound inductor in the LQH43 series, delivering 820 µH inductance in a standard 1812 (4532 Metric) surface-mount package. Rated at 60 mA with a maximum DC resistance of 20.5 Ohms, this part suits low-current power supply filtering, bias-T networks, and noise suppression where the DC bias stays under 60 mA. ## Unshielded construction and self-resonant frequency This inductor is unshielded, meaning the magnetic field radiates from the drum core — keep it spaced from sensitive analog traces or adjacent magnetics to avoid coupling. The self-resonant frequency is 2.2 MHz; above that the impedance turns capacitive, so the part is best used well below that frequency for inductive filtering. Q factor is 40 at 796 kHz, giving moderate efficiency in the low-MHz range. The ferrite core material handles the 820 µH value with a ±5% tolerance, tested at 1 kHz.","metaTitle":"Murata LQH43MN821J03L 820 µH Inductor, 60 mA, 1812","metaDescription":"Murata LQH43MN821J03L drum core wirewound inductor, 820 µH ±5%, 60 mA rated current, 20.5 Ohm DCR, 1812 SMD package. Active production, available 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":"±5%","Inductance":"820 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":"LQH43MN","DC Resistance (DCR)":"20.5Ohm Max","Current Rating (Amps)":"60 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C~85°C","Supplier Device Package":"1812","Frequency - Self Resonant":"2.2MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 kHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4900","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d1493e4ce66984c31e9b5c6bbb04d9e5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the LQH43MN821J03L in the LQH43 series?","answer":"Within the same LQH43 series and 1812 package, the closest alternative would be a different inductance value — there is no exact 820 µH ±5% replacement with the same current rating. For a BOM second-source, look for other Murata 1812 wirewound inductors in the LQH43 family at the same inductance and tolerance, then verify the DCR and current rating match your derating margin."},{"question":"What compliance documentation does Murata provide for the LQH43MN821J03L?","answer":"Murata typically provides RoHS and REACH compliance declarations for the LQH43 series. The part does not carry UL or IEC certifications — those are not standard for discrete wirewound inductors of this class. Compliance documentation is available from the manufacturer or through your sourcing channel upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43MN821J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43MN821J03L 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}}